55665666656 has 12 divisors (see below), whose sum is σ = 109591781292. Its totient is φ = 27832833312.

The previous prime is 55665666629. The next prime is 55665666673. The reversal of 55665666656 is 65666656655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 869776010 + ... + 869776073.

It is an arithmetic number, because the mean of its divisors is an integer number (9132648441).

Almost surely, 2^55665666656 is an apocalyptic number.

It is an amenable number.

55665666656 is a deficient number, since it is larger than the sum of its proper divisors (53926114636).

55665666656 is a wasteful number, since it uses less digits than its factorization.

55665666656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739552093 (or 1739552085 counting only the distinct ones).

The product of its digits is 174960000, while the sum is 62.

The spelling of 55665666656 in words is "fifty-five billion, six hundred sixty-five million, six hundred sixty-six thousand, six hundred fifty-six".