55660860 has 72 divisors (see below), whose sum is σ = 174676320. Its totient is φ = 14329728.

The previous prime is 55660859. The next prime is 55660883. The reversal of 55660860 is 6806655.

It is a super-3 number, since 3×55660860³ (a number of 24 digits) contains 333 as substring.

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

It is a congruent number.

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, 112 + ... + 10551.

It is an arithmetic number, because the mean of its divisors is an integer number (2426060).

Almost surely, 2^55660860 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 55660860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87338160).

55660860 is an abundant number, since it is smaller than the sum of its proper divisors (119015460).

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

55660860 is a wasteful number, since it uses less digits than its factorization.

55660860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10707 (or 10702 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 55660860 is about 7460.6206176162. The cubic root of 55660860 is about 381.8123490142.

It can be divided in two parts, 556 and 60860, that added together give a palindrome (61416).

The spelling of 55660860 in words is "fifty-five million, six hundred sixty thousand, eight hundred sixty".