56669791 has 2 divisors, whose sum is σ = 56669792. Its totient is φ = 56669790.

The previous prime is 56669779. The next prime is 56669797. The reversal of 56669791 is 19796665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56669791 - 2⁵ = 56669759 is a prime.

It is a super-2 number, since 2×56669791² = 6422930423967362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56669797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28334895 + 28334896.

It is an arithmetic number, because the mean of its divisors is an integer number (28334896).

Almost surely, 2^56669791 is an apocalyptic number.

56669791 is a deficient number, since it is larger than the sum of its proper divisors (1).

56669791 is an equidigital number, since it uses as much as digits as its factorization.

56669791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 49.

The square root of 56669791 is about 7527.9340459385. The cubic root of 56669791 is about 384.1055098343.

The spelling of 56669791 in words is "fifty-six million, six hundred sixty-nine thousand, seven hundred ninety-one".