56669447 has 8 divisors (see below), whose sum is σ = 59688576. Its totient is φ = 53696632.

The previous prime is 56669443. The next prime is 56669453. The reversal of 56669447 is 74496665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56669447 - 2² = 56669443 is a prime.

It is a super-2 number, since 2×56669447² = 6422852446571618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56669443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9053 + ... + 13974.

It is an arithmetic number, because the mean of its divisors is an integer number (7461072).

Almost surely, 2^56669447 is an apocalyptic number.

56669447 is a deficient number, since it is larger than the sum of its proper divisors (3019129).

56669447 is a wasteful number, since it uses less digits than its factorization.

56669447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23157.

The product of its digits is 1088640, while the sum is 47.

The square root of 56669447 is about 7527.9111976696. The cubic root of 56669447 is about 384.1047326268.

The spelling of 56669447 in words is "fifty-six million, six hundred sixty-nine thousand, four hundred forty-seven".