555566666440 has 32 divisors (see below), whose sum is σ = 1267148636280. Its totient is φ = 219182464512.

The previous prime is 555566666423. The next prime is 555566666441. The reversal of 555566666440 is 44666665555.

It can be written as a sum of positive squares in 4 ways, for example, as 265280622916 + 290286043524 = 515054^2 + 538782^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (555566666441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95128359 + ... + 95134198.

Almost surely, 2^555566666440 is an apocalyptic number.

It is an amenable number.

555566666440 is an abundant number, since it is smaller than the sum of its proper divisors (711581969840).

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

555566666440 is a wasteful number, since it uses less digits than its factorization.

555566666440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190262641 (or 190262637 counting only the distinct ones).

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

The spelling of 555566666440 in words is "five hundred fifty-five billion, five hundred sixty-six million, six hundred sixty-six thousand, four hundred forty".