55666680 has 32 divisors (see below), whose sum is σ = 167000400. Its totient is φ = 14844416.

The previous prime is 55666679. The next prime is 55666697. The reversal of 55666680 is 8666655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231825 + ... + 232064.

Almost surely, 2^55666680 is an apocalyptic number.

It is an amenable number.

55666680 is an abundant number, since it is smaller than the sum of its proper divisors (111333720).

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

55666680 is a wasteful number, since it uses less digits than its factorization.

55666680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463903 (or 463899 counting only the distinct ones).

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

The square root of 55666680 is about 7461.0106554005. The cubic root of 55666680 is about 381.8256562132.

It can be divided in two parts, 5566 and 6680, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 55666680 in words is "fifty-five million, six hundred sixty-six thousand, six hundred eighty".