64661818884175 has 12 divisors (see below), whose sum is σ = 80392213885720. Its totient is φ = 51592965772320.

The previous prime is 64661818884161. The next prime is 64661818884191. The reversal of 64661818884175 is 57148881816646.

It is not a de Polignac number, because 64661818884175 - 2⁹ = 64661818883663 is a prime.

It is a hoax number, since the sum of its digits (73) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 64661818884098 and 64661818884107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3412223712 + ... + 3412242661.

Almost surely, 2^{64661818884175} is an apocalyptic number.

64661818884175 is a deficient number, since it is larger than the sum of its proper divisors (15730395001545).

64661818884175 is a wasteful number, since it uses less digits than its factorization.

64661818884175 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6824466762 (or 6824466757 counting only the distinct ones).

The product of its digits is 495452160, while the sum is 73.

The spelling of 64661818884175 in words is "sixty-four trillion, six hundred sixty-one billion, eight hundred eighteen million, eight hundred eighty-four thousand, one hundred seventy-five".