64266560 has 56 divisors (see below), whose sum is σ = 153878280. Its totient is φ = 25565184.

The previous prime is 64266551. The next prime is 64266583. The reversal of 64266560 is 6566246.

It can be written as a sum of positive squares in 4 ways, for example, as 31181056 + 33085504 = 5584^2 + 5752^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64266560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72842 + ... + 73718.

Almost surely, 2^64266560 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 64266560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76939140).

64266560 is an abundant number, since it is smaller than the sum of its proper divisors (89611720).

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

64266560 is a wasteful number, since it uses less digits than its factorization.

64266560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 64266560 is about 8016.6426888068. The cubic root of 64266560 is about 400.5545641246.

The spelling of 64266560 in words is "sixty-four million, two hundred sixty-six thousand, five hundred sixty".