669119100491 has 2 divisors, whose sum is σ = 669119100492. Its totient is φ = 669119100490.

The previous prime is 669119100487. The next prime is 669119100521. The reversal of 669119100491 is 194001911966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669119100491 - 2² = 669119100487 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (669119100431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334559550245 + 334559550246.

It is an arithmetic number, because the mean of its divisors is an integer number (334559550246).

Almost surely, 2^669119100491 is an apocalyptic number.

669119100491 is a deficient number, since it is larger than the sum of its proper divisors (1).

669119100491 is an equidigital number, since it uses as much as digits as its factorization.

669119100491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 47.

The spelling of 669119100491 in words is "six hundred sixty-nine billion, one hundred nineteen million, one hundred thousand, four hundred ninety-one".