556666666655 has 64 divisors (see below), whose sum is σ = 745031468160. Its totient is φ = 395907072000.

The previous prime is 556666666607. The next prime is 556666666669.

556666666655 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 556666666655 - 2¹⁴ = 556666650271 is a prime.

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 63 ways as a sum of consecutive naturals, for example, 435916877 + ... + 435918153.

It is an arithmetic number, because the mean of its divisors is an integer number (11641116690).

Almost surely, 2^556666666655 is an apocalyptic number.

556666666655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

556666666655 is a deficient number, since it is larger than the sum of its proper divisors (188364801505).

556666666655 is a wasteful number, since it uses less digits than its factorization.

556666666655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300.

The product of its digits is 1049760000, while the sum is 68.

The spelling of 556666666655 in words is "five hundred fifty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred fifty-five".