55660513 has 2 divisors, whose sum is σ = 55660514. Its totient is φ = 55660512.

The previous prime is 55660489. The next prime is 55660537. The reversal of 55660513 is 31506655.

It is a balanced prime because it is at equal distance from previous prime (55660489) and next prime (55660537).

It can be written as a sum of positive squares in only one way, i.e., 33315984 + 22344529 = 5772^2 + 4727^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55660513 is a prime.

It is not a weakly prime, because it can be changed into another prime (55660573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27830256 + 27830257.

It is an arithmetic number, because the mean of its divisors is an integer number (27830257).

Almost surely, 2^55660513 is an apocalyptic number.

It is an amenable number.

55660513 is a deficient number, since it is larger than the sum of its proper divisors (1).

55660513 is an equidigital number, since it uses as much as digits as its factorization.

55660513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 55660513 is about 7460.5973621420. The cubic root of 55660513 is about 381.8115555831.

The spelling of 55660513 in words is "fifty-five million, six hundred sixty thousand, five hundred thirteen".