5665637639 has 2 divisors, whose sum is σ = 5665637640. Its totient is φ = 5665637638.

The previous prime is 5665637609. The next prime is 5665637641. The reversal of 5665637639 is 9367365665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5665637639 - 2¹⁶ = 5665572103 is a prime.

Together with 5665637641, 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 (5665637609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2832818819 + 2832818820.

It is an arithmetic number, because the mean of its divisors is an integer number (2832818820).

Almost surely, 2^5665637639 is an apocalyptic number.

5665637639 is a deficient number, since it is larger than the sum of its proper divisors (1).

5665637639 is an equidigital number, since it uses as much as digits as its factorization.

5665637639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18370800, while the sum is 56.

The square root of 5665637639 is about 75270.4300439422. The cubic root of 5665637639 is about 1782.7191575043.

The spelling of 5665637639 in words is "five billion, six hundred sixty-five million, six hundred thirty-seven thousand, six hundred thirty-nine".