56664993 has 64 divisors (see below), whose sum is σ = 100122624. Its totient is φ = 27648000.

The previous prime is 56664989. The next prime is 56664997. The reversal of 56664993 is 39946665.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56664989) and next prime (56664997).

It is not a de Polignac number, because 56664993 - 2² = 56664989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56664997) 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 in 63 ways as a sum of consecutive naturals, for example, 293505 + ... + 293697.

It is an arithmetic number, because the mean of its divisors is an integer number (1564416).

Almost surely, 2^56664993 is an apocalyptic number.

It is an amenable number.

56664993 is a deficient number, since it is larger than the sum of its proper divisors (43457631).

56664993 is a wasteful number, since it uses less digits than its factorization.

56664993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286.

The product of its digits is 1049760, while the sum is 48.

The square root of 56664993 is about 7527.6153594615. The cubic root of 56664993 is about 384.0946693129.

The spelling of 56664993 in words is "fifty-six million, six hundred sixty-four thousand, nine hundred ninety-three".