551166565608 has 32 divisors (see below), whose sum is σ = 1531018238400. Its totient is φ = 183722188464.

The previous prime is 551166565549. The next prime is 551166565613. The reversal of 551166565608 is 806565661155.

It is a happy number.

551166565608 is a `hidden beast` number, since 5 + 5 + 1 + 16 + 6 + 565 + 60 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1275848316 + ... + 1275848747.

It is an arithmetic number, because the mean of its divisors is an integer number (47844319950).

Almost surely, 2^551166565608 is an apocalyptic number.

It is an amenable number.

551166565608 is an abundant number, since it is smaller than the sum of its proper divisors (979851672792).

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

551166565608 is a wasteful number, since it uses less digits than its factorization.

551166565608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551697078 (or 2551697068 counting only the distinct ones).

The product of its (nonzero) digits is 6480000, while the sum is 54.

The spelling of 551166565608 in words is "five hundred fifty-one billion, one hundred sixty-six million, five hundred sixty-five thousand, six hundred eight".