55308660 has 96 divisors (see below), whose sum is σ = 172634112. Its totient is φ = 13115520.

The previous prime is 55308653. The next prime is 55308697. The reversal of 55308660 is 6680355.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30129 + ... + 31911.

It is an arithmetic number, because the mean of its divisors is an integer number (1798272).

Almost surely, 2^55308660 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 55308660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86317056).

55308660 is an abundant number, since it is smaller than the sum of its proper divisors (117325452).

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

55308660 is a wasteful number, since it uses less digits than its factorization.

55308660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853 (or 1851 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 55308660 is about 7436.9792254651. The cubic root of 55308660 is about 381.0053250473.

The spelling of 55308660 in words is "fifty-five million, three hundred eight thousand, six hundred sixty".