5665566631 has 2 divisors, whose sum is σ = 5665566632. Its totient is φ = 5665566630.

The previous prime is 5665566629. The next prime is 5665566667. The reversal of 5665566631 is 1366655665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5665566631 - 2¹ = 5665566629 is a prime.

It is a super-2 number, since 2×5665566631² = 64197290500601380322, which contains 22 as substring.

Together with 5665566629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5665566691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2832783315 + 2832783316.

It is an arithmetic number, because the mean of its divisors is an integer number (2832783316).

Almost surely, 2^5665566631 is an apocalyptic number.

5665566631 is a deficient number, since it is larger than the sum of its proper divisors (1).

5665566631 is an equidigital number, since it uses as much as digits as its factorization.

5665566631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916000, while the sum is 49.

The square root of 5665566631 is about 75269.9583565714. The cubic root of 5665566631 is about 1782.7117098076.

The spelling of 5665566631 in words is "five billion, six hundred sixty-five million, five hundred sixty-six thousand, six hundred thirty-one".