55655666 has 8 divisors (see below), whose sum is σ = 91072944. Its totient is φ = 25298020.

The previous prime is 55655647. The next prime is 55655687. The reversal of 55655666 is 66655655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264880 + ... + 1264923.

It is an arithmetic number, because the mean of its divisors is an integer number (11384118).

Almost surely, 2^55655666 is an apocalyptic number.

55655666 is a deficient number, since it is larger than the sum of its proper divisors (35417278).

55655666 is a wasteful number, since it uses less digits than its factorization.

55655666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2529816.

The product of its digits is 810000, while the sum is 44.

The square root of 55655666 is about 7460.2725151297. The cubic root of 55655666 is about 381.8004723560.

The spelling of 55655666 in words is "fifty-five million, six hundred fifty-five thousand, six hundred sixty-six".