669887594496 has 448 divisors, whose sum is σ = 2080128085200. Its totient is φ = 215373053952.

The previous prime is 669887594491. The next prime is 669887594507. The reversal of 669887594496 is 694495788966.

669887594496 is a `hidden beast` number, since 6 + 6 + 98 + 87 + 5 + 9 + 449 + 6 = 666.

It is a Smith number, since the sum of its digits (81) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669887594491) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 692747805 + ... + 692748771.

Almost surely, 2^669887594496 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 669887594496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1040064042600).

669887594496 is an abundant number, since it is smaller than the sum of its proper divisors (1410240490704).

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

669887594496 is an frugal number, since it uses more digits than its factorization.

669887594496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044 (or 1001 counting only the distinct ones).

The product of its digits is 5643509760, while the sum is 81.

The spelling of 669887594496 in words is "six hundred sixty-nine billion, eight hundred eighty-seven million, five hundred ninety-four thousand, four hundred ninety-six".