55566018 has 24 divisors (see below), whose sum is σ = 120530748. Its totient is φ = 18500832.

The previous prime is 55566011. The next prime is 55566031. The reversal of 55566018 is 81066555.

It can be written as a sum of positive squares in 2 ways, for example, as 55308969 + 257049 = 7437^2 + 507^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55566011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27780 + ... + 29712.

Almost surely, 2^55566018 is an apocalyptic number.

55566018 is an abundant number, since it is smaller than the sum of its proper divisors (64964730).

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

55566018 is a wasteful number, since it uses less digits than its factorization.

55566018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3538 (or 3535 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 55566018 is about 7454.2617340686. The cubic root of 55566018 is about 381.5953656993.

The spelling of 55566018 in words is "fifty-five million, five hundred sixty-six thousand, eighteen".