56665623 has 16 divisors (see below), whose sum is σ = 89326080. Its totient is φ = 31263456.

The previous prime is 56665621. The next prime is 56665627. The reversal of 56665623 is 32656665.

It is not a de Polignac number, because 56665623 - 2¹ = 56665621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56665621) 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, 45915 + ... + 47132.

It is an arithmetic number, because the mean of its divisors is an integer number (5582880).

Almost surely, 2^56665623 is an apocalyptic number.

56665623 is a deficient number, since it is larger than the sum of its proper divisors (32660457).

56665623 is a wasteful number, since it uses less digits than its factorization.

56665623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93086.

The product of its digits is 194400, while the sum is 39.

The square root of 56665623 is about 7527.6572052665. The cubic root of 56665623 is about 384.0960927593.

The spelling of 56665623 in words is "fifty-six million, six hundred sixty-five thousand, six hundred twenty-three".