668869037 has 2 divisors, whose sum is σ = 668869038. Its totient is φ = 668869036.

The previous prime is 668869009. The next prime is 668869093. The reversal of 668869037 is 730968866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 651985156 + 16883881 = 25534^2 + 4109^2 .

It is a cyclic number.

It is not a de Polignac number, because 668869037 - 2¹⁶ = 668803501 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 668869037.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668869007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334434518 + 334434519.

It is an arithmetic number, because the mean of its divisors is an integer number (334434519).

Almost surely, 2^668869037 is an apocalyptic number.

It is an amenable number.

668869037 is a deficient number, since it is larger than the sum of its proper divisors (1).

668869037 is an equidigital number, since it uses as much as digits as its factorization.

668869037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The square root of 668869037 is about 25862.5025277911. The cubic root of 668869037 is about 874.5413812145.

The spelling of 668869037 in words is "six hundred sixty-eight million, eight hundred sixty-nine thousand, thirty-seven".