55660569 has 8 divisors (see below), whose sum is σ = 74261952. Its totient is φ = 37083120.

The previous prime is 55660537. The next prime is 55660571. The reversal of 55660569 is 96506655.

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

It is not a de Polignac number, because 55660569 - 2⁵ = 55660537 is a prime.

It is a super-2 number, since 2×55660569² = 6196197882807522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55660569.

It is not an unprimeable number, because it can be changed into a prime (55660169) 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, 427 + ... + 10559.

It is an arithmetic number, because the mean of its divisors is an integer number (9282744).

Almost surely, 2^55660569 is an apocalyptic number.

It is an amenable number.

55660569 is a deficient number, since it is larger than the sum of its proper divisors (18601383).

55660569 is a wasteful number, since it uses less digits than its factorization.

55660569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11967.

The product of its (nonzero) digits is 243000, while the sum is 42.

The square root of 55660569 is about 7460.6011151917. The cubic root of 55660569 is about 381.8116836299.

The spelling of 55660569 in words is "fifty-five million, six hundred sixty thousand, five hundred sixty-nine".