166987052544 has 80 divisors (see below), whose sum is σ = 479084305392. Its totient is φ = 51380625408.

The previous prime is 166987052539. The next prime is 166987052591. The reversal of 166987052544 is 445250789661.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 4161399 + ... + 4201334.

Almost surely, 2^166987052544 is an apocalyptic number.

It is an amenable number.

166987052544 is an abundant number, since it is smaller than the sum of its proper divisors (312097252848).

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

166987052544 is an equidigital number, since it uses as much as digits as its factorization.

166987052544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8362767 (or 8362751 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 57.

The spelling of 166987052544 in words is "one hundred sixty-six billion, nine hundred eighty-seven million, fifty-two thousand, five hundred forty-four".