56278665 has 64 divisors (see below), whose sum is σ = 108345600. Its totient is φ = 27620352.

The previous prime is 56278657. The next prime is 56278669. The reversal of 56278665 is 56687265.

56278665 is a `hidden beast` number, since 562 + 7 + 86 + 6 + 5 = 666.

It is not a de Polignac number, because 56278665 - 2³ = 56278657 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 56278665.

It is not an unprimeable number, because it can be changed into a prime (56278669) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 94609 + ... + 95201.

It is an arithmetic number, because the mean of its divisors is an integer number (1692900).

Almost surely, 2^56278665 is an apocalyptic number.

It is an amenable number.

56278665 is a deficient number, since it is larger than the sum of its proper divisors (52066935).

56278665 is a wasteful number, since it uses less digits than its factorization.

56278665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 657 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 56278665 is about 7501.9107566006. The cubic root of 56278665 is about 383.2197903586.

The spelling of 56278665 in words is "fifty-six million, two hundred seventy-eight thousand, six hundred sixty-five".