56666693 has 2 divisors, whose sum is σ = 56666694. Its totient is φ = 56666692.

The previous prime is 56666689. The next prime is 56666707. The reversal of 56666693 is 39666665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56055169 + 611524 = 7487^2 + 782^2 .

It is a cyclic number.

It is not a de Polignac number, because 56666693 - 2² = 56666689 is a prime.

It is a super-2 number, since 2×56666693² = 6422228191112498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56666653) 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 as a sum of consecutive naturals, namely, 28333346 + 28333347.

It is an arithmetic number, because the mean of its divisors is an integer number (28333347).

Almost surely, 2^56666693 is an apocalyptic number.

It is an amenable number.

56666693 is a deficient number, since it is larger than the sum of its proper divisors (1).

56666693 is an equidigital number, since it uses as much as digits as its factorization.

56666693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1049760, while the sum is 47.

The square root of 56666693 is about 7527.7282761800. The cubic root of 56666693 is about 384.0985103346.

The spelling of 56666693 in words is "fifty-six million, six hundred sixty-six thousand, six hundred ninety-three".