669462604969 has 2 divisors, whose sum is σ = 669462604970. Its totient is φ = 669462604968.

The previous prime is 669462604939. The next prime is 669462604997. The reversal of 669462604969 is 969406264966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 669390694569 + 71910400 = 818163^2 + 8480^2 .

It is a cyclic number.

It is not a de Polignac number, because 669462604969 - 2¹⁵ = 669462572201 is a prime.

It is a super-2 number, since 2×669462604969² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (669462604939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334731302484 + 334731302485.

It is an arithmetic number, because the mean of its divisors is an integer number (334731302485).

Almost surely, 2^669462604969 is an apocalyptic number.

It is an amenable number.

669462604969 is a deficient number, since it is larger than the sum of its proper divisors (1).

669462604969 is an equidigital number, since it uses as much as digits as its factorization.

669462604969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181398528, while the sum is 67.

The spelling of 669462604969 in words is "six hundred sixty-nine billion, four hundred sixty-two million, six hundred four thousand, nine hundred sixty-nine".