669900031511813 has 2 divisors, whose sum is σ = 669900031511814. Its totient is φ = 669900031511812.

The previous prime is 669900031511717. The next prime is 669900031511873. The reversal of 669900031511813 is 318115130009966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386198627851969 + 283701403659844 = 19651937^2 + 16843438^2 .

It is a cyclic number.

It is not a de Polignac number, because 669900031511813 - 2²² = 669900027317509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669900031511873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334950015755906 + 334950015755907.

It is an arithmetic number, because the mean of its divisors is an integer number (334950015755907).

Almost surely, 2^{669900031511813} is an apocalyptic number.

It is an amenable number.

669900031511813 is a deficient number, since it is larger than the sum of its proper divisors (1).

669900031511813 is an equidigital number, since it uses as much as digits as its factorization.

669900031511813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 53.

The spelling of 669900031511813 in words is "six hundred sixty-nine trillion, nine hundred billion, thirty-one million, five hundred eleven thousand, eight hundred thirteen".