65942265816 has 96 divisors (see below), whose sum is σ = 204232055040. Its totient is φ = 18829105344.

The previous prime is 65942265793. The next prime is 65942265853. The reversal of 65942265816 is 61856224956.

65942265816 is a `hidden beast` number, since 6 + 59 + 4 + 2 + 2 + 6 + 581 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 800925 + ... + 879411.

It is an arithmetic number, because the mean of its divisors is an integer number (2127417240).

Almost surely, 2^65942265816 is an apocalyptic number.

It is an amenable number.

65942265816 is an abundant number, since it is smaller than the sum of its proper divisors (138289789224).

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

65942265816 is a wasteful number, since it uses less digits than its factorization.

65942265816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80173 (or 80166 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 65942265816 in words is "sixty-five billion, nine hundred forty-two million, two hundred sixty-five thousand, eight hundred sixteen".