166154004 has 30 divisors (see below), whose sum is σ = 434360234. Its totient is φ = 55384560.

The previous prime is 166154003. The next prime is 166154029. The reversal of 166154004 is 400451661.

166154004 is a `hidden beast` number, since 1 + 6 + 615 + 40 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 165173904 + 980100 = 12852^2 + 990^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166154003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 256087 + ... + 256734.

Almost surely, 2^166154004 is an apocalyptic number.

It is an amenable number.

166154004 is an abundant number, since it is smaller than the sum of its proper divisors (268206230).

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

166154004 is a wasteful number, since it uses less digits than its factorization.

166154004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512837 (or 512826 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 166154004 is about 12890.0738554905. The cubic root of 166154004 is about 549.7563703339.

The spelling of 166154004 in words is "one hundred sixty-six million, one hundred fifty-four thousand, four".