55556666644 has 12 divisors (see below), whose sum is σ = 98556005044. Its totient is φ = 27397808064.

The previous prime is 55556666617. The next prime is 55556666657. The reversal of 55556666644 is 44666665555.

It can be written as a sum of positive squares in 2 ways, for example, as 10128007044 + 45428659600 = 100638^2 + 213140^2 .

It is a zygodrome in base 10.

It is a congruent number.

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, 95130987 + ... + 95131570.

Almost surely, 2^55556666644 is an apocalyptic number.

It is an amenable number.

55556666644 is a deficient number, since it is larger than the sum of its proper divisors (42999338400).

55556666644 is a wasteful number, since it uses less digits than its factorization.

55556666644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190262634 (or 190262632 counting only the distinct ones).

The product of its digits is 77760000, while the sum is 58.

The spelling of 55556666644 in words is "fifty-five billion, five hundred fifty-six million, six hundred sixty-six thousand, six hundred forty-four".