669708368560 has 240 divisors, whose sum is σ = 2005944397056. Its totient is φ = 202004928000.

The previous prime is 669708368533. The next prime is 669708368597. The reversal of 669708368560 is 65863807966.

It is a junction number, because it is equal to n+sod(n) for n = 669708368492 and 669708368501.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5863195 + ... + 5976325.

Almost surely, 2^669708368560 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669708368560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002972198528).

669708368560 is an abundant number, since it is smaller than the sum of its proper divisors (1336236028496).

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

669708368560 is a wasteful number, since it uses less digits than its factorization.

669708368560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113224 (or 113187 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 64.

The spelling of 669708368560 in words is "six hundred sixty-nine billion, seven hundred eight million, three hundred sixty-eight thousand, five hundred sixty".