665637832837 has 2 divisors, whose sum is σ = 665637832838. Its totient is φ = 665637832836.

The previous prime is 665637832823. The next prime is 665637832859. The reversal of 665637832837 is 738238736566.

665637832837 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 339150157956 + 326487674881 = 582366^2 + 571391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665637832837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665637832037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332818916418 + 332818916419.

It is an arithmetic number, because the mean of its divisors is an integer number (332818916419).

Almost surely, 2^665637832837 is an apocalyptic number.

It is an amenable number.

665637832837 is a deficient number, since it is larger than the sum of its proper divisors (1).

665637832837 is an equidigital number, since it uses as much as digits as its factorization.

665637832837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 182891520, while the sum is 64.

The spelling of 665637832837 in words is "six hundred sixty-five billion, six hundred thirty-seven million, eight hundred thirty-two thousand, eight hundred thirty-seven".