668095669 has 2 divisors, whose sum is σ = 668095670. Its totient is φ = 668095668.

The previous prime is 668095639. The next prime is 668095679. The reversal of 668095669 is 966590866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 661004100 + 7091569 = 25710^2 + 2663^2 .

It is a cyclic number.

It is not a de Polignac number, because 668095669 - 2⁷ = 668095541 is a prime.

It is a super-2 number, since 2×668095669² = 892703645873115122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668095619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334047834 + 334047835.

It is an arithmetic number, because the mean of its divisors is an integer number (334047835).

Almost surely, 2^668095669 is an apocalyptic number.

It is an amenable number.

668095669 is a deficient number, since it is larger than the sum of its proper divisors (1).

668095669 is an equidigital number, since it uses as much as digits as its factorization.

668095669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4199040, while the sum is 55.

The square root of 668095669 is about 25847.5466727502. The cubic root of 668095669 is about 874.2041935546.

The spelling of 668095669 in words is "six hundred sixty-eight million, ninety-five thousand, six hundred sixty-nine".