56669799 has 16 divisors (see below), whose sum is σ = 82281600. Its totient is φ = 34556256.

The previous prime is 56669797. The next prime is 56669803. The reversal of 56669799 is 99796665.

It is not a de Polignac number, because 56669799 - 2¹ = 56669797 is a prime.

It is a super-2 number, since 2×56669799² = 6422932237400802, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56669791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15489 + ... + 18794.

It is an arithmetic number, because the mean of its divisors is an integer number (5142600).

Almost surely, 2^56669799 is an apocalyptic number.

56669799 is a deficient number, since it is larger than the sum of its proper divisors (25611801).

56669799 is a wasteful number, since it uses less digits than its factorization.

56669799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34334.

The product of its digits is 5511240, while the sum is 57.

The square root of 56669799 is about 7527.9345772928. The cubic root of 56669799 is about 384.1055279089.

The spelling of 56669799 in words is "fifty-six million, six hundred sixty-nine thousand, seven hundred ninety-nine".