65672806520 has 16 divisors (see below), whose sum is σ = 147763814760. Its totient is φ = 26269122592.

The previous prime is 65672806517. The next prime is 65672806649. The reversal of 65672806520 is 2560827656.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820910042 + ... + 820910121.

Almost surely, 2^65672806520 is an apocalyptic number.

It is an amenable number.

65672806520 is an abundant number, since it is smaller than the sum of its proper divisors (82091008240).

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

65672806520 is a wasteful number, since it uses less digits than its factorization.

65672806520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641820174 (or 1641820170 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 47.

The spelling of 65672806520 in words is "sixty-five billion, six hundred seventy-two million, eight hundred six thousand, five hundred twenty".