55666668 has 24 divisors (see below), whose sum is σ = 130547200. Its totient is φ = 18461520.

The previous prime is 55666657. The next prime is 55666679. The reversal of 55666668 is 86666655.

It is an interprime number because it is at equal distance from previous prime (55666657) and next prime (55666679).

It is a plaindrome in base 10.

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, 9268 + ... + 14043.

Almost surely, 2^55666668 is an apocalyptic number.

It is an amenable number.

55666668 is an abundant number, since it is smaller than the sum of its proper divisors (74880532).

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

55666668 is a wasteful number, since it uses less digits than its factorization.

55666668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23517 (or 23515 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 48.

The square root of 55666668 is about 7461.0098512199. The cubic root of 55666668 is about 381.8256287766.

The spelling of 55666668 in words is "fifty-five million, six hundred sixty-six thousand, six hundred sixty-eight".