65867855772 has 12 divisors (see below), whose sum is σ = 153691663496. Its totient is φ = 21955951920.

The previous prime is 65867855737. The next prime is 65867855773. The reversal of 65867855772 is 27755876856.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65867855773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2744493979 + ... + 2744494002.

Almost surely, 2^65867855772 is an apocalyptic number.

It is an amenable number.

65867855772 is an abundant number, since it is smaller than the sum of its proper divisors (87823807724).

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

65867855772 is a wasteful number, since it uses less digits than its factorization.

65867855772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5488987988 (or 5488987986 counting only the distinct ones).

The product of its digits is 197568000, while the sum is 66.

The spelling of 65867855772 in words is "sixty-five billion, eight hundred sixty-seven million, eight hundred fifty-five thousand, seven hundred seventy-two".