166115556 has 48 divisors (see below), whose sum is σ = 453342400. Its totient is φ = 52456896.

The previous prime is 166115549. The next prime is 166115557. The reversal of 166115556 is 655511661.

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

It is a self number, because there is not a number n which added to its sum of digits gives 166115556.

It is not an unprimeable number, because it can be changed into a prime (166115557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38425 + ... + 42528.

Almost surely, 2^166115556 is an apocalyptic number.

It is an amenable number.

166115556 is an abundant number, since it is smaller than the sum of its proper divisors (287226844).

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

166115556 is a wasteful number, since it uses less digits than its factorization.

166115556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80985 (or 80977 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 166115556 is about 12888.5823890760. The cubic root of 166115556 is about 549.7139625616.

The spelling of 166115556 in words is "one hundred sixty-six million, one hundred fifteen thousand, five hundred fifty-six".