53611660 has 12 divisors (see below), whose sum is σ = 112584528. Its totient is φ = 21444656.

The previous prime is 53611651. The next prime is 53611697. The reversal of 53611660 is 6611635.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1340272 + ... + 1340311.

It is an arithmetic number, because the mean of its divisors is an integer number (9382044).

Almost surely, 2^53611660 is an apocalyptic number.

It is an amenable number.

53611660 is an abundant number, since it is smaller than the sum of its proper divisors (58972868).

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

53611660 is a wasteful number, since it uses less digits than its factorization.

53611660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680592 (or 2680590 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 53611660 is about 7321.9983611033. The cubic root of 53611660 is about 377.0680643641.

It can be divided in two parts, 5361 and 1660, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 53611660 in words is "fifty-three million, six hundred eleven thousand, six hundred sixty".