65620056 has 64 divisors (see below), whose sum is σ = 171417600. Its totient is φ = 20908800.

The previous prime is 65620043. The next prime is 65620063. The reversal of 65620056 is 65002656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65721 + ... + 66711.

It is an arithmetic number, because the mean of its divisors is an integer number (2678400).

Almost surely, 2^65620056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65620056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85708800).

65620056 is an abundant number, since it is smaller than the sum of its proper divisors (105797544).

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

65620056 is a wasteful number, since it uses less digits than its factorization.

65620056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 65620056 is about 8100.6207169574. The cubic root of 65620056 is about 403.3470319931.

The spelling of 65620056 in words is "sixty-five million, six hundred twenty thousand, fifty-six".