56666833866665 has 8 divisors (see below), whose sum is σ = 74182037061888. Its totient is φ = 41212242812080.

The previous prime is 56666833866623. The next prime is 56666833866677.

56666833866665 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56666833866665 - 2¹⁴ = 56666833850281 is a prime.

It is a super-2 number, since 2×56666833866665² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56666833866665.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515153035097 + ... + 515153035206.

It is an arithmetic number, because the mean of its divisors is an integer number (9272754632736).

Almost surely, 2^{56666833866665} is an apocalyptic number.

56666833866665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56666833866665 is a deficient number, since it is larger than the sum of its proper divisors (17515203195223).

56666833866665 is a wasteful number, since it uses less digits than its factorization.

56666833866665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030306070319.

The product of its digits is 24186470400, while the sum is 80.

The spelling of 56666833866665 in words is "fifty-six trillion, six hundred sixty-six billion, eight hundred thirty-three million, eight hundred sixty-six thousand, six hundred sixty-five".