166423392 has 72 divisors (see below), whose sum is σ = 482240304. Its totient is φ = 54422784.

The previous prime is 166423391. The next prime is 166423393. The reversal of 166423392 is 293324661.

166423392 is a `hidden beast` number, since 1 + 6 + 642 + 3 + 3 + 9 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (166423391) and next prime (166423393).

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166423391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9813 + ... + 20715.

It is an arithmetic number, because the mean of its divisors is an integer number (6697782).

Almost surely, 2^166423392 is an apocalyptic number.

166423392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166423392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241120152).

166423392 is an abundant number, since it is smaller than the sum of its proper divisors (315816912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166423392 is a wasteful number, since it uses less digits than its factorization.

166423392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10972 (or 10961 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 166423392 is about 12900.5190593247. The cubic root of 166423392 is about 550.0533193487.

The spelling of 166423392 in words is "one hundred sixty-six million, four hundred twenty-three thousand, three hundred ninety-two".