5666617637 has 2 divisors, whose sum is σ = 5666617638. Its totient is φ = 5666617636.

The previous prime is 5666617597. The next prime is 5666617639. The reversal of 5666617637 is 7367166665.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4487794081 + 1178823556 = 66991^2 + 34334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5666617637 is a prime.

It is a super-2 number, since 2×5666617637² = 64221110887918927538, which contains 22 as substring.

Together with 5666617639, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5666617639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2833308818 + 2833308819.

It is an arithmetic number, because the mean of its divisors is an integer number (2833308819).

Almost surely, 2^5666617637 is an apocalyptic number.

It is an amenable number.

5666617637 is a deficient number, since it is larger than the sum of its proper divisors (1).

5666617637 is an equidigital number, since it uses as much as digits as its factorization.

5666617637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 53.

The square root of 5666617637 is about 75276.9396096839. The cubic root of 5666617637 is about 1782.8219385502.

The spelling of 5666617637 in words is "five billion, six hundred sixty-six million, six hundred seventeen thousand, six hundred thirty-seven".