64661818884177 has 32 divisors (see below), whose sum is σ = 91175715717120. Its totient is φ = 40649449337280.

The previous prime is 64661818884161. The next prime is 64661818884191. The reversal of 64661818884177 is 77148881816646.

It is not a de Polignac number, because 64661818884177 - 2⁴ = 64661818884161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64661818884099 and 64661818884108.

It is not an unprimeable number, because it can be changed into a prime (64661818884127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7702803 + ... + 13735239.

It is an arithmetic number, because the mean of its divisors is an integer number (2849241116160).

Almost surely, 2^{64661818884177} is an apocalyptic number.

It is an amenable number.

64661818884177 is a deficient number, since it is larger than the sum of its proper divisors (26513896832943).

64661818884177 is a wasteful number, since it uses less digits than its factorization.

64661818884177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6033333.

The product of its digits is 693633024, while the sum is 75.

The spelling of 64661818884177 in words is "sixty-four trillion, six hundred sixty-one billion, eight hundred eighteen million, eight hundred eighty-four thousand, one hundred seventy-seven".