55913665 has 4 divisors (see below), whose sum is σ = 67096404. Its totient is φ = 44730928.

The previous prime is 55913657. The next prime is 55913681. The reversal of 55913665 is 56631955.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5914624 + 49999041 = 2432^2 + 7071^2 .

It is a cyclic number.

It is not a de Polignac number, because 55913665 - 2³ = 55913657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5591362 + ... + 5591371.

It is an arithmetic number, because the mean of its divisors is an integer number (16774101).

Almost surely, 2^55913665 is an apocalyptic number.

It is an amenable number.

55913665 is a deficient number, since it is larger than the sum of its proper divisors (11182739).

55913665 is a wasteful number, since it uses less digits than its factorization.

55913665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11182738.

The product of its digits is 121500, while the sum is 40.

The square root of 55913665 is about 7477.5440486834. The cubic root of 55913665 is about 382.3895248184.

The spelling of 55913665 in words is "fifty-five million, nine hundred thirteen thousand, six hundred sixty-five".