665500000037 has 2 divisors, whose sum is σ = 665500000038. Its totient is φ = 665500000036.

The previous prime is 665499999977. The next prime is 665500000057. The reversal of 665500000037 is 730000005566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 665335493761 + 164506276 = 815681^2 + 12826^2 .

It is a cyclic number.

It is not a de Polignac number, because 665500000037 - 2⁸ = 665499999781 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665499999949 and 665500000012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665500000057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332750000018 + 332750000019.

It is an arithmetic number, because the mean of its divisors is an integer number (332750000019).

Almost surely, 2^665500000037 is an apocalyptic number.

It is an amenable number.

665500000037 is a deficient number, since it is larger than the sum of its proper divisors (1).

665500000037 is an equidigital number, since it uses as much as digits as its factorization.

665500000037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 32.

The spelling of 665500000037 in words is "six hundred sixty-five billion, five hundred million, thirty-seven", and thus it is an aban number.