52665660 has 96 divisors (see below), whose sum is σ = 173517120. Its totient is φ = 13215744.

The previous prime is 52665637. The next prime is 52665667. The reversal of 52665660 is 6656625.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52665667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6312 + ... + 12048.

It is an arithmetic number, because the mean of its divisors is an integer number (1807470).

Almost surely, 2^52665660 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 52665660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86758560).

52665660 is an abundant number, since it is smaller than the sum of its proper divisors (120851460).

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

52665660 is a wasteful number, since it uses less digits than its factorization.

52665660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5772 (or 5764 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 52665660 is about 7257.1109954306. The cubic root of 52665660 is about 374.8370492024.

The spelling of 52665660 in words is "fifty-two million, six hundred sixty-five thousand, six hundred sixty".