55566517 has 8 divisors (see below), whose sum is σ = 57195072. Its totient is φ = 53961600.

The previous prime is 55566509. The next prime is 55566559. The reversal of 55566517 is 71566555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55566517 - 2³ = 55566509 is a prime.

It is a super-2 number, since 2×55566517² = 6175275623022578, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55566517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55566587) 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, 1084 + ... + 10597.

It is an arithmetic number, because the mean of its divisors is an integer number (7149384).

Almost surely, 2^55566517 is an apocalyptic number.

It is an amenable number.

55566517 is a deficient number, since it is larger than the sum of its proper divisors (1628555).

55566517 is a wasteful number, since it uses less digits than its factorization.

55566517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11819.

The product of its digits is 157500, while the sum is 40.

The square root of 55566517 is about 7454.2952047796. The cubic root of 55566517 is about 381.5965079773.

The spelling of 55566517 in words is "fifty-five million, five hundred sixty-six thousand, five hundred seventeen".