166557042610 has 32 divisors (see below), whose sum is σ = 342696765312. Its totient is φ = 57094416000.

The previous prime is 166557042593. The next prime is 166557042611. The reversal of 166557042610 is 16240755661.

It is a super-2 number, since 2×166557042610² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (166557042611) 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, 149110 + ... + 596110.

It is an arithmetic number, because the mean of its divisors is an integer number (10709273916).

Almost surely, 2^166557042610 is an apocalyptic number.

166557042610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166557042610 is an abundant number, since it is smaller than the sum of its proper divisors (176139722702).

166557042610 is a wasteful number, since it uses less digits than its factorization.

166557042610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452338.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 166557042610 in words is "one hundred sixty-six billion, five hundred fifty-seven million, forty-two thousand, six hundred ten".