166427604 has 72 divisors (see below), whose sum is σ = 482763008. Its totient is φ = 47355840.

The previous prime is 166427543. The next prime is 166427627. The reversal of 166427604 is 406724661.

166427604 is a `hidden beast` number, since 1 + 6 + 6 + 42 + 7 + 604 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67074 + ... + 69510.

Almost surely, 2^166427604 is an apocalyptic number.

166427604 is a gapful number since it is divisible by the number (14) 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 166427604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241381504).

166427604 is an abundant number, since it is smaller than the sum of its proper divisors (316335404).

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

166427604 is a wasteful number, since it uses less digits than its factorization.

166427604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725 (or 2720 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 166427604 is about 12900.6823075371. The cubic root of 166427604 is about 550.0579597321.

The spelling of 166427604 in words is "one hundred sixty-six million, four hundred twenty-seven thousand, six hundred four".