166668432 has 80 divisors (see below), whose sum is σ = 493694592. Its totient is φ = 47462400.

The previous prime is 166668401. The next prime is 166668449. The reversal of 166668432 is 234866661.

It is a Harshad number since it is a multiple of its sum of digits (42).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134118 + ... + 135354.

Almost surely, 2^166668432 is an apocalyptic number.

166668432 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 166668432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246847296).

166668432 is an abundant number, since it is smaller than the sum of its proper divisors (327026160).

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

166668432 is a wasteful number, since it uses less digits than its factorization.

166668432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656 (or 1650 counting only the distinct ones).

The product of its digits is 248832, while the sum is 42.

The square root of 166668432 is about 12910.0128582430. The cubic root of 166668432 is about 550.3231511430.

The spelling of 166668432 in words is "one hundred sixty-six million, six hundred sixty-eight thousand, four hundred thirty-two".