166440311564536 has 32 divisors (see below), whose sum is σ = 312644257560000. Its totient is φ = 83068535218176.

The previous prime is 166440311564521. The next prime is 166440311564563. The reversal of 166440311564536 is 635465113044661.

It is a happy number.

166440311564536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166440311564536² (a number of 29 digits) contains 22 as substring.

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, 50465440 + ... + 53662288.

It is an arithmetic number, because the mean of its divisors is an integer number (9770133048750).

Almost surely, 2^{166440311564536} is an apocalyptic number.

It is an amenable number.

166440311564536 is a deficient number, since it is larger than the sum of its proper divisors (146203945995464).

166440311564536 is a wasteful number, since it uses less digits than its factorization.

166440311564536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208711 (or 3208707 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 55.

The spelling of 166440311564536 in words is "one hundred sixty-six trillion, four hundred forty billion, three hundred eleven million, five hundred sixty-four thousand, five hundred thirty-six".