65520660 has 48 divisors (see below), whose sum is σ = 184133376. Its totient is φ = 17407872.

The previous prime is 65520647. The next prime is 65520709. The reversal of 65520660 is 6602556.

65520660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15717 + ... + 19443.

It is an arithmetic number, because the mean of its divisors is an integer number (3836112).

Almost surely, 2^65520660 is an apocalyptic number.

65520660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65520660 is an abundant number, since it is smaller than the sum of its proper divisors (118612716).

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

65520660 is a wasteful number, since it uses less digits than its factorization.

65520660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4032 (or 4030 counting only the distinct ones).

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

The square root of 65520660 is about 8094.4833065490. The cubic root of 65520660 is about 403.1432764985.

The spelling of 65520660 in words is "sixty-five million, five hundred twenty thousand, six hundred sixty".