55855660 has 24 divisors (see below), whose sum is σ = 134053920. Its totient is φ = 19150464.

The previous prime is 55855651. The next prime is 55855663. The reversal of 55855660 is 6655855.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55855663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199345 + ... + 199624.

It is an arithmetic number, because the mean of its divisors is an integer number (5585580).

Almost surely, 2^55855660 is an apocalyptic number.

It is an amenable number.

55855660 is an abundant number, since it is smaller than the sum of its proper divisors (78198260).

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

55855660 is a wasteful number, since it uses less digits than its factorization.

55855660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398985 (or 398983 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 40.

The square root of 55855660 is about 7473.6644291806. The cubic root of 55855660 is about 382.2572483951.

The spelling of 55855660 in words is "fifty-five million, eight hundred fifty-five thousand, six hundred sixty".