5666611657 has 8 divisors (see below), whose sum is σ = 6492443456. Its totient is φ = 4844858832.

The previous prime is 5666611651. The next prime is 5666611663. The reversal of 5666611657 is 7561166665.

It is an interprime number because it is at equal distance from previous prime (5666611651) and next prime (5666611663).

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 5666611657 - 2⁷ = 5666611529 is a prime.

It is a super-2 number, since 2×5666611657² = 64220975342496571298, which 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 5666611657.

It is not an unprimeable number, because it can be changed into a prime (5666611651) 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, 1016763 + ... + 1022320.

It is an arithmetic number, because the mean of its divisors is an integer number (811555432).

Almost surely, 2^5666611657 is an apocalyptic number.

It is an amenable number.

5666611657 is a deficient number, since it is larger than the sum of its proper divisors (825831799).

5666611657 is a wasteful number, since it uses less digits than its factorization.

5666611657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039487.

The product of its digits is 1360800, while the sum is 49.

The square root of 5666611657 is about 75276.8998896740. The cubic root of 5666611657 is about 1782.8213114107.

The spelling of 5666611657 in words is "five billion, six hundred sixty-six million, six hundred eleven thousand, six hundred fifty-seven".