56663659 has 8 divisors (see below), whose sum is σ = 62057520. Its totient is φ = 51417696.

The previous prime is 56663647. The next prime is 56663683. The reversal of 56663659 is 95636665.

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 56663659 - 2¹⁹ = 56139371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56663639) 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, 36172 + ... + 37705.

It is an arithmetic number, because the mean of its divisors is an integer number (7757190).

Almost surely, 2^56663659 is an apocalyptic number.

56663659 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

56663659 is a deficient number, since it is larger than the sum of its proper divisors (5393861).

56663659 is a wasteful number, since it uses less digits than its factorization.

56663659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73949.

The product of its digits is 874800, while the sum is 46.

The square root of 56663659 is about 7527.5267518621. The cubic root of 56663659 is about 384.0916551868.

It can be divided in two parts, 566636 and 59, that multiplied together give a square (33431524 = 5782²).

The spelling of 56663659 in words is "fifty-six million, six hundred sixty-three thousand, six hundred fifty-nine".