55660571 has 2 divisors, whose sum is σ = 55660572. Its totient is φ = 55660570.

The previous prime is 55660537. The next prime is 55660573. The reversal of 55660571 is 17506655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55660571 - 2¹⁴ = 55644187 is a prime.

Together with 55660573, it forms a pair of twin primes.

It is a Chen prime.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27830285 + 27830286.

It is an arithmetic number, because the mean of its divisors is an integer number (27830286).

Almost surely, 2^55660571 is an apocalyptic number.

55660571 is a deficient number, since it is larger than the sum of its proper divisors (1).

55660571 is an equidigital number, since it uses as much as digits as its factorization.

55660571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 55660571 is about 7460.6012492292. The cubic root of 55660571 is about 381.8116882030.

The spelling of 55660571 in words is "fifty-five million, six hundred sixty thousand, five hundred seventy-one".