65564460 has 72 divisors (see below), whose sum is σ = 214184880. Its totient is φ = 16138368.

The previous prime is 65564449. The next prime is 65564489. The reversal of 65564460 is 6446556.

It is a happy number.

65564460 is a `hidden beast` number, since 6 + 5 + 5 + 644 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11670 + ... + 16349.

It is an arithmetic number, because the mean of its divisors is an integer number (2974790).

Almost surely, 2^65564460 is an apocalyptic number.

65564460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65564460 is an abundant number, since it is smaller than the sum of its proper divisors (148620420).

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

65564460 is a wasteful number, since it uses less digits than its factorization.

65564460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28047 (or 28042 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 65564460 is about 8097.1884009204. The cubic root of 65564460 is about 403.2330890975.

The spelling of 65564460 in words is "sixty-five million, five hundred sixty-four thousand, four hundred sixty".