166645453464452 has 24 divisors (see below), whose sum is σ = 298412240028672. Its totient is φ = 81384821431200.

The previous prime is 166645453464433. The next prime is 166645453464521. The reversal of 166645453464452 is 254464354546661.

It is a happy number.

It is a super-4 number, since 4×166645453464452⁴ (a number of 58 digits) contains 4444 as substring.

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, 143775677 + ... + 144930107.

It is an arithmetic number, because the mean of its divisors is an integer number (12433843334528).

Almost surely, 2^{166645453464452} is an apocalyptic number.

It is an amenable number.

166645453464452 is a deficient number, since it is larger than the sum of its proper divisors (131766786564220).

166645453464452 is a wasteful number, since it uses less digits than its factorization.

166645453464452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993739 (or 1993737 counting only the distinct ones).

The product of its digits is 995328000, while the sum is 65.

The spelling of 166645453464452 in words is "one hundred sixty-six trillion, six hundred forty-five billion, four hundred fifty-three million, four hundred sixty-four thousand, four hundred fifty-two".