56655691 has 2 divisors, whose sum is σ = 56655692. Its totient is φ = 56655690.

The previous prime is 56655659. The next prime is 56655733. The reversal of 56655691 is 19655665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56655691 - 2⁵ = 56655659 is a prime.

It is not a weakly prime, because it can be changed into another prime (56655091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28327845 + 28327846.

It is an arithmetic number, because the mean of its divisors is an integer number (28327846).

Almost surely, 2^56655691 is an apocalyptic number.

56655691 is a deficient number, since it is larger than the sum of its proper divisors (1).

56655691 is an equidigital number, since it uses as much as digits as its factorization.

56655691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 243000, while the sum is 43.

The square root of 56655691 is about 7526.9974757535. The cubic root of 56655691 is about 384.0736507854.

The spelling of 56655691 in words is "fifty-six million, six hundred fifty-five thousand, six hundred ninety-one".