56661488416665 has 48 divisors (see below), whose sum is σ = 107142567255360. Its totient is φ = 27472020474240.

The previous prime is 56661488416661. The next prime is 56661488416679.

56661488416665 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56661488416665 - 2² = 56661488416661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56661488416593 and 56661488416602.

It is not an unprimeable number, because it can be changed into a prime (56661488416661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75330579 + ... + 76079031.

It is an arithmetic number, because the mean of its divisors is an integer number (2232136817820).

Almost surely, 2^{56661488416665} is an apocalyptic number.

56661488416665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56661488416665 is a deficient number, since it is larger than the sum of its proper divisors (50481078838695).

56661488416665 is a wasteful number, since it uses less digits than its factorization.

56661488416665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901414 (or 901411 counting only the distinct ones).

The product of its digits is 1194393600, while the sum is 72.

The spelling of 56661488416665 in words is "fifty-six trillion, six hundred sixty-one billion, four hundred eighty-eight million, four hundred sixteen thousand, six hundred sixty-five".