166440311564516 has 18 divisors (see below), whose sum is σ = 320156880303750. Its totient is φ = 75654687074560.

The previous prime is 166440311564477. The next prime is 166440311564521. The reversal of 166440311564516 is 615465113044661.

It can be written as a sum of positive squares in only one way, i.e., 155418509156416 + 11021802408100 = 12466696^2 + 3319910^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 171942470141 + ... + 171942471108.

Almost surely, 2^{166440311564516} is an apocalyptic number.

It is an amenable number.

166440311564516 is a deficient number, since it is larger than the sum of its proper divisors (153716568739234).

166440311564516 is a wasteful number, since it uses less digits than its factorization.

166440311564516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343884941275 (or 343884941262 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 53.

The spelling of 166440311564516 in words is "one hundred sixty-six trillion, four hundred forty billion, three hundred eleven million, five hundred sixty-four thousand, five hundred sixteen".