555220666 has 48 divisors (see below), whose sum is σ = 1138203360. Its totient is φ = 199674720.

The previous prime is 555220657. The next prime is 555220669. The reversal of 555220666 is 666022555.

It is not an unprimeable number, because it can be changed into a prime (555220669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5796 + ... + 33823.

It is an arithmetic number, because the mean of its divisors is an integer number (23712570).

Almost surely, 2^555220666 is an apocalyptic number.

555220666 is an abundant number, since it is smaller than the sum of its proper divisors (582982694).

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

555220666 is a wasteful number, since it uses less digits than its factorization.

555220666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39659 (or 39652 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 555220666 is about 23563.1208883713. The cubic root of 555220666 is about 821.9054765087.

The spelling of 555220666 in words is "five hundred fifty-five million, two hundred twenty thousand, six hundred sixty-six".