56664947 has 2 divisors, whose sum is σ = 56664948. Its totient is φ = 56664946.

The previous prime is 56664941. The next prime is 56664977. The reversal of 56664947 is 74946665.

56664947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56664947 - 2¹⁰ = 56663923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56664941) 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 as a sum of consecutive naturals, namely, 28332473 + 28332474.

It is an arithmetic number, because the mean of its divisors is an integer number (28332474).

Almost surely, 2^56664947 is an apocalyptic number.

56664947 is a deficient number, since it is larger than the sum of its proper divisors (1).

56664947 is an equidigital number, since it uses as much as digits as its factorization.

56664947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 47.

The square root of 56664947 is about 7527.6123040444. The cubic root of 56664947 is about 384.0945653783.

The spelling of 56664947 in words is "fifty-six million, six hundred sixty-four thousand, nine hundred forty-seven".