65651166666644 has 96 divisors (see below), whose sum is σ = 132817048721280. Its totient is φ = 28123854041088.

The previous prime is 65651166666563. The next prime is 65651166666677. The reversal of 65651166666644 is 44666666115656.

It is a Harshad number since it is a multiple of its sum of digits (68).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 531875567 + ... + 531998985.

It is an arithmetic number, because the mean of its divisors is an integer number (1383510924180).

Almost surely, 2^{65651166666644} is an apocalyptic number.

It is an amenable number.

65651166666644 is an abundant number, since it is smaller than the sum of its proper divisors (67165882054636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65651166666644 is a wasteful number, since it uses less digits than its factorization.

65651166666644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131769 (or 131767 counting only the distinct ones).

The product of its digits is 671846400, while the sum is 68.

The spelling of 65651166666644 in words is "sixty-five trillion, six hundred fifty-one billion, one hundred sixty-six million, six hundred sixty-six thousand, six hundred forty-four".