56666717005 has 4 divisors (see below), whose sum is σ = 68000060412. Its totient is φ = 45333373600.

The previous prime is 56666716987. The next prime is 56666717017. The reversal of 56666717005 is 50071766665.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50071766665 = 5 ⋅10014353333.

It can be written as a sum of positive squares in 2 ways, for example, as 21460199049 + 35206517956 = 146493^2 + 187634^2 .

It is not a de Polignac number, because 56666717005 - 2⁵ = 56666716973 is a prime.

It is a super-2 number, since 2×56666717005² (a number of 22 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 56666717005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5666671696 + ... + 5666671705.

It is an arithmetic number, because the mean of its divisors is an integer number (17000015103).

Almost surely, 2^56666717005 is an apocalyptic number.

It is an amenable number.

56666717005 is a deficient number, since it is larger than the sum of its proper divisors (11333343407).

56666717005 is a wasteful number, since it uses less digits than its factorization.

56666717005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11333343406.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The spelling of 56666717005 in words is "fifty-six billion, six hundred sixty-six million, seven hundred seventeen thousand, five".