55597566 has 16 divisors (see below), whose sum is σ = 111366144. Its totient is φ = 18504024.

The previous prime is 55597543. The next prime is 55597567. The reversal of 55597566 is 66579555.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55597567) 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, 2686 + ... + 10881.

It is an arithmetic number, because the mean of its divisors is an integer number (6960384).

Almost surely, 2^55597566 is an apocalyptic number.

55597566 is an abundant number, since it is smaller than the sum of its proper divisors (55768578).

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

55597566 is a wasteful number, since it uses less digits than its factorization.

55597566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14255.

The product of its digits is 1417500, while the sum is 48.

The square root of 55597566 is about 7456.3775387248. The cubic root of 55597566 is about 381.6675698594.

The spelling of 55597566 in words is "fifty-five million, five hundred ninety-seven thousand, five hundred sixty-six".