166440311564515 has 16 divisors (see below), whose sum is σ = 204475765827168. Its totient is φ = 129990428741376.

The previous prime is 166440311564477. The next prime is 166440311564521. The reversal of 166440311564515 is 515465113044661.

166440311564515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 166440311564515 - 2⁹ = 166440311564003 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193786504 + ... + 194643493.

It is an arithmetic number, because the mean of its divisors is an integer number (12779735364198).

Almost surely, 2^{166440311564515} is an apocalyptic number.

166440311564515 is a deficient number, since it is larger than the sum of its proper divisors (38035454262653).

166440311564515 is a wasteful number, since it uses less digits than its factorization.

166440311564515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388432038.

The product of its (nonzero) digits is 5184000, while the sum is 52.

The spelling of 166440311564515 in words is "one hundred sixty-six trillion, four hundred forty billion, three hundred eleven million, five hundred sixty-four thousand, five hundred fifteen".