166231387056 has 40 divisors (see below), whose sum is σ = 490778381824. Its totient is φ = 47494681920.

The previous prime is 166231387043. The next prime is 166231387109. The reversal of 166231387056 is 650783132661.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 166231386996 and 166231387014.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247367800 + ... + 247368471.

Almost surely, 2^166231387056 is an apocalyptic number.

166231387056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166231387056 is an abundant number, since it is smaller than the sum of its proper divisors (324546994768).

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

166231387056 is a wasteful number, since it uses less digits than its factorization.

166231387056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494736289 (or 494736283 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 166231387056 in words is "one hundred sixty-six billion, two hundred thirty-one million, three hundred eighty-seven thousand, fifty-six".