166644164069019 has 96 divisors (see below), whose sum is σ = 304682681139200. Its totient is φ = 87208088038848.

The previous prime is 166644164068999. The next prime is 166644164069057. The reversal of 166644164069019 is 910960461446661.

It is not a de Polignac number, because 166644164069019 - 2²⁴ = 166644147291803 is a prime.

It is a super-2 number, since 2×166644164069019² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (166644164064019) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11251807 + ... + 21445080.

Almost surely, 2^{166644164069019} is an apocalyptic number.

166644164069019 is a deficient number, since it is larger than the sum of its proper divisors (138038517070181).

166644164069019 is a wasteful number, since it uses less digits than its factorization.

166644164069019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32697054 (or 32697037 counting only the distinct ones).

The product of its (nonzero) digits is 40310784, while the sum is 63.

The spelling of 166644164069019 in words is "one hundred sixty-six trillion, six hundred forty-four billion, one hundred sixty-four million, sixty-nine thousand, nineteen".