55660537 has 2 divisors, whose sum is σ = 55660538. Its totient is φ = 55660536.

The previous prime is 55660513. The next prime is 55660571. The reversal of 55660537 is 73506655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52577001 + 3083536 = 7251^2 + 1756^2 .

It is a cyclic number.

It is not a de Polignac number, because 55660537 - 2²³ = 47271929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55660496 and 55660505.

It is not a weakly prime, because it can be changed into another prime (55660337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27830268 + 27830269.

It is an arithmetic number, because the mean of its divisors is an integer number (27830269).

Almost surely, 2^55660537 is an apocalyptic number.

It is an amenable number.

55660537 is a deficient number, since it is larger than the sum of its proper divisors (1).

55660537 is an equidigital number, since it uses as much as digits as its factorization.

55660537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94500, while the sum is 37.

The square root of 55660537 is about 7460.5989705921. The cubic root of 55660537 is about 381.8116104603.

The spelling of 55660537 in words is "fifty-five million, six hundred sixty thousand, five hundred thirty-seven".