56668313 has 4 divisors (see below), whose sum is σ = 61027428. Its totient is φ = 52309200.

The previous prime is 56668301. The next prime is 56668319. The reversal of 56668313 is 31386665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31386665 = 5 ⋅6277333.

It can be written as a sum of positive squares in 2 ways, for example, as 2968729 + 53699584 = 1723^2 + 7328^2 .

It is a cyclic number.

It is not a de Polignac number, because 56668313 - 2¹² = 56664217 is a prime.

It is a super-2 number, since 2×56668313² = 6422595396531938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56668319) 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 3 ways as a sum of consecutive naturals, for example, 2179538 + ... + 2179563.

It is an arithmetic number, because the mean of its divisors is an integer number (15256857).

Almost surely, 2^56668313 is an apocalyptic number.

It is an amenable number.

56668313 is a deficient number, since it is larger than the sum of its proper divisors (4359115).

56668313 is a wasteful number, since it uses less digits than its factorization.

56668313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4359114.

The product of its digits is 77760, while the sum is 38.

The square root of 56668313 is about 7527.8358775946. The cubic root of 56668313 is about 384.1021705309.

The spelling of 56668313 in words is "fifty-six million, six hundred sixty-eight thousand, three hundred thirteen".