56668211 has 2 divisors, whose sum is σ = 56668212. Its totient is φ = 56668210.

The previous prime is 56668189. The next prime is 56668247. The reversal of 56668211 is 11286665.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56668211 - 2⁶ = 56668147 is a prime.

It is a super-2 number, since 2×56668211² = 6422572275881042, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56668411) 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, 28334105 + 28334106.

It is an arithmetic number, because the mean of its divisors is an integer number (28334106).

Almost surely, 2^56668211 is an apocalyptic number.

56668211 is a deficient number, since it is larger than the sum of its proper divisors (1).

56668211 is an equidigital number, since it uses as much as digits as its factorization.

56668211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 56668211 is about 7527.8291027361. The cubic root of 56668211 is about 384.1019400762.

The spelling of 56668211 in words is "fifty-six million, six hundred sixty-eight thousand, two hundred eleven".