56447666 has 16 divisors (see below), whose sum is σ = 92570688. Its totient is φ = 25602000.

The previous prime is 56447617. The next prime is 56447687. The reversal of 56447666 is 66674465.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8516 + ... + 13616.

It is an arithmetic number, because the mean of its divisors is an integer number (5785668).

Almost surely, 2^56447666 is an apocalyptic number.

56447666 is a deficient number, since it is larger than the sum of its proper divisors (36123022).

56447666 is a wasteful number, since it uses less digits than its factorization.

56447666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5617.

The product of its digits is 725760, while the sum is 44.

The square root of 56447666 is about 7513.1661767859. The cubic root of 56447666 is about 383.6030013433.

The spelling of 56447666 in words is "fifty-six million, four hundred forty-seven thousand, six hundred sixty-six".