65671565872 has 40 divisors (see below), whose sum is σ = 140760847872. Its totient is φ = 29430273600.

The previous prime is 65671565863. The next prime is 65671565881. The reversal of 65671565872 is 27856517656.

It is an interprime number because it is at equal distance from previous prime (65671565863) and next prime (65671565881).

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, 2615208 + ... + 2640199.

Almost surely, 2^65671565872 is an apocalyptic number.

It is an amenable number.

65671565872 is an abundant number, since it is smaller than the sum of its proper divisors (75089282000).

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

65671565872 is a wasteful number, since it uses less digits than its factorization.

65671565872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5255497 (or 5255491 counting only the distinct ones).

The product of its digits is 21168000, while the sum is 58.

The spelling of 65671565872 in words is "sixty-five billion, six hundred seventy-one million, five hundred sixty-five thousand, eight hundred seventy-two".