56642663 has 16 divisors (see below), whose sum is σ = 71068416. Its totient is φ = 43856640.

The previous prime is 56642659. The next prime is 56642681. The reversal of 56642663 is 36624665.

It is a cyclic number.

It is not a de Polignac number, because 56642663 - 2² = 56642659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56642633) 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, 10295 + ... + 14807.

It is an arithmetic number, because the mean of its divisors is an integer number (4441776).

Almost surely, 2^56642663 is an apocalyptic number.

56642663 is a deficient number, since it is larger than the sum of its proper divisors (14425753).

56642663 is a wasteful number, since it uses less digits than its factorization.

56642663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4694.

The product of its digits is 155520, while the sum is 38.

The square root of 56642663 is about 7526.1320078776. The cubic root of 56642663 is about 384.0442092294.

The spelling of 56642663 in words is "fifty-six million, six hundred forty-two thousand, six hundred sixty-three".