669608958 has 16 divisors (see below), whose sum is σ = 1341453456. Its totient is φ = 222830400.

The previous prime is 669608941. The next prime is 669608969. The reversal of 669608958 is 859806966.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 669608898 and 669608907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89241 + ... + 96452.

It is an arithmetic number, because the mean of its divisors is an integer number (83840841).

Almost surely, 2^669608958 is an apocalyptic number.

669608958 is an abundant number, since it is smaller than the sum of its proper divisors (671844498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669608958 is a wasteful number, since it uses less digits than its factorization.

669608958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186299.

The product of its (nonzero) digits is 5598720, while the sum is 57.

The square root of 669608958 is about 25876.8034733813. The cubic root of 669608958 is about 874.8637428100.

The spelling of 669608958 in words is "six hundred sixty-nine million, six hundred eight thousand, nine hundred fifty-eight".