56667747 has 16 divisors (see below), whose sum is σ = 79717760. Its totient is φ = 35707392.

The previous prime is 56667713. The next prime is 56667763. The reversal of 56667747 is 74776665.

56667747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56667747 - 2¹⁰ = 56666723 is a prime.

It is a super-2 number, since 2×56667747² = 6422467100112018, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56667696 and 56667705.

It is not an unprimeable number, because it can be changed into a prime (56667797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32028 + ... + 33750.

It is an arithmetic number, because the mean of its divisors is an integer number (4982360).

Almost surely, 2^56667747 is an apocalyptic number.

56667747 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

56667747 is a deficient number, since it is larger than the sum of its proper divisors (23050013).

56667747 is a wasteful number, since it uses less digits than its factorization.

56667747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322.

The product of its digits is 1481760, while the sum is 48.

The square root of 56667747 is about 7527.7982836949. The cubic root of 56667747 is about 384.1008917295.

The spelling of 56667747 in words is "fifty-six million, six hundred sixty-seven thousand, seven hundred forty-seven".