55666860 has 48 divisors (see below), whose sum is σ = 156492000. Its totient is φ = 14785024.

The previous prime is 55666841. The next prime is 55666901. The reversal of 55666860 is 6866655.

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, 14416 + ... + 17864.

It is an arithmetic number, because the mean of its divisors is an integer number (3260250).

Almost surely, 2^55666860 is an apocalyptic number.

It is an amenable number.

55666860 is an abundant number, since it is smaller than the sum of its proper divisors (100825140).

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

55666860 is a wasteful number, since it uses less digits than its factorization.

55666860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3730 (or 3728 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 55666860 is about 7461.0227180997. The cubic root of 55666860 is about 381.8260677613.

The spelling of 55666860 in words is "fifty-five million, six hundred sixty-six thousand, eight hundred sixty".