65772166120 has 32 divisors (see below), whose sum is σ = 148533477120. Its totient is φ = 26211781440.

The previous prime is 65772166049. The next prime is 65772166153. The reversal of 65772166120 is 2166127756.

It is a super-2 number, since 2×65772166120² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3022932 + ... + 3044611.

It is an arithmetic number, because the mean of its divisors is an integer number (4641671160).

Almost surely, 2^65772166120 is an apocalyptic number.

It is an amenable number.

65772166120 is an abundant number, since it is smaller than the sum of its proper divisors (82761311000).

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

65772166120 is a wasteful number, since it uses less digits than its factorization.

65772166120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6067825 (or 6067821 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 65772166120 in words is "sixty-five billion, seven hundred seventy-two million, one hundred sixty-six thousand, one hundred twenty".