56663436665 has 24 divisors (see below), whose sum is σ = 74758730760. Its totient is φ = 41199192320.

The previous prime is 56663436631. The next prime is 56663436671.

56663436665 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 793605241 + 55869831424 = 28171^2 + 236368^2 .

It is a de Polignac number, because none of the positive numbers 2^k-56663436665 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56663436665.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2948267 + ... + 2967423.

It is an arithmetic number, because the mean of its divisors is an integer number (3114947115).

Almost surely, 2^56663436665 is an apocalyptic number.

56663436665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56663436665 is a deficient number, since it is larger than the sum of its proper divisors (18095294095).

56663436665 is a wasteful number, since it uses less digits than its factorization.

56663436665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24073 (or 24062 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 56.

The spelling of 56663436665 in words is "fifty-six billion, six hundred sixty-three million, four hundred thirty-six thousand, six hundred sixty-five".