55661700 has 36 divisors (see below), whose sum is σ = 161048720. Its totient is φ = 14843040.

The previous prime is 55661699. The next prime is 55661719. The reversal of 55661700 is 716655.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92470 + ... + 93069.

Almost surely, 2^55661700 is an apocalyptic number.

55661700 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55661700 is an abundant number, since it is smaller than the sum of its proper divisors (105387020).

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

55661700 is a wasteful number, since it uses less digits than its factorization.

55661700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185556 (or 185549 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 55661700 is about 7460.6769129885. The cubic root of 55661700 is about 381.8142696981.

The spelling of 55661700 in words is "fifty-five million, six hundred sixty-one thousand, seven hundred".