56664799 has 2 divisors, whose sum is σ = 56664800. Its totient is φ = 56664798.

The previous prime is 56664779. The next prime is 56664809. The reversal of 56664799 is 99746665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56664799 - 2⁵ = 56664767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56664779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28332399 + 28332400.

It is an arithmetic number, because the mean of its divisors is an integer number (28332400).

Almost surely, 2^56664799 is an apocalyptic number.

56664799 is a deficient number, since it is larger than the sum of its proper divisors (1).

56664799 is an equidigital number, since it uses as much as digits as its factorization.

56664799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 52.

The square root of 56664799 is about 7527.6024735635. The cubic root of 56664799 is about 384.0942309796.

The spelling of 56664799 in words is "fifty-six million, six hundred sixty-four thousand, seven hundred ninety-nine".