669669480979 has 2 divisors, whose sum is σ = 669669480980. Its totient is φ = 669669480978.

The previous prime is 669669480973. The next prime is 669669481037. The reversal of 669669480979 is 979084966966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669669480979 - 2³ = 669669480971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 669669480899 and 669669480908.

It is not a weakly prime, because it can be changed into another prime (669669480971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334834740489 + 334834740490.

It is an arithmetic number, because the mean of its divisors is an integer number (334834740490).

Almost surely, 2^669669480979 is an apocalyptic number.

669669480979 is a deficient number, since it is larger than the sum of its proper divisors (1).

669669480979 is an equidigital number, since it uses as much as digits as its factorization.

669669480979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1904684544, while the sum is 79.

The spelling of 669669480979 in words is "six hundred sixty-nine billion, six hundred sixty-nine million, four hundred eighty thousand, nine hundred seventy-nine".