55611660 has 96 divisors (see below), whose sum is σ = 169908480. Its totient is φ = 13508352.

The previous prime is 55611659. The next prime is 55611667. The reversal of 55611660 is 6611655.

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

It is not an unprimeable number, because it can be changed into a prime (55611667) 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, 64311 + ... + 65169.

It is an arithmetic number, because the mean of its divisors is an integer number (1769880).

Almost surely, 2^55611660 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 55611660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84954240).

55611660 is an abundant number, since it is smaller than the sum of its proper divisors (114296820).

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

55611660 is a wasteful number, since it uses less digits than its factorization.

55611660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967 (or 965 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 55611660 is about 7457.3225758311. The cubic root of 55611660 is about 381.6998180832.

The spelling of 55611660 in words is "fifty-five million, six hundred eleven thousand, six hundred sixty".