73665565620 has 48 divisors (see below), whose sum is σ = 210652178688. Its totient is φ = 19226189440.

The previous prime is 73665565619. The next prime is 73665565681. The reversal of 73665565620 is 2656556637.

It is a super-2 number, since 2×73665565620² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 13058451 + ... + 13064090.

It is an arithmetic number, because the mean of its divisors is an integer number (4388587056).

Almost surely, 2^73665565620 is an apocalyptic number.

It is an amenable number.

73665565620 is an abundant number, since it is smaller than the sum of its proper divisors (136986613068).

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

73665565620 is a wasteful number, since it uses less digits than its factorization.

73665565620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26122600 (or 26122598 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 51.

The spelling of 73665565620 in words is "seventy-three billion, six hundred sixty-five million, five hundred sixty-five thousand, six hundred twenty".