55198866 has 32 divisors (see below), whose sum is σ = 112953600. Its totient is φ = 17977680.

The previous prime is 55198841. The next prime is 55198889. The reversal of 55198866 is 66889155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74325 + ... + 75063.

It is an arithmetic number, because the mean of its divisors is an integer number (3529800).

Almost surely, 2^55198866 is an apocalyptic number.

55198866 is an abundant number, since it is smaller than the sum of its proper divisors (57754734).

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

55198866 is a wasteful number, since it uses less digits than its factorization.

55198866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014.

The product of its digits is 518400, while the sum is 48.

The square root of 55198866 is about 7429.5939323761. The cubic root of 55198866 is about 380.7530450263.

The spelling of 55198866 in words is "fifty-five million, one hundred ninety-eight thousand, eight hundred sixty-six".