56664297 has 6 divisors (see below), whose sum is σ = 81848442. Its totient is φ = 37776192.

The previous prime is 56664259. The next prime is 56664299. The reversal of 56664297 is 79246665.

It can be written as a sum of positive squares in only one way, i.e., 52838361 + 3825936 = 7269^2 + 1956^2 .

It is not a de Polignac number, because 56664297 - 2⁷ = 56664169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56664299) 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 5 ways as a sum of consecutive naturals, for example, 3148008 + ... + 3148025.

It is an arithmetic number, because the mean of its divisors is an integer number (13641407).

Almost surely, 2^56664297 is an apocalyptic number.

It is an amenable number.

56664297 is a deficient number, since it is larger than the sum of its proper divisors (25184145).

56664297 is a wasteful number, since it uses less digits than its factorization.

56664297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6296039 (or 6296036 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 56664297 is about 7527.5691295398. The cubic root of 56664297 is about 384.0930967312.

The spelling of 56664297 in words is "fifty-six million, six hundred sixty-four thousand, two hundred ninety-seven".