669874646484 has 288 divisors, whose sum is σ = 1846301184000. Its totient is φ = 212101908480.

The previous prime is 669874646471. The next prime is 669874646501. The reversal of 669874646484 is 484646478966.

669874646484 is a `hidden beast` number, since 6 + 6 + 9 + 87 + 4 + 6 + 464 + 84 = 666.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 906460587 + ... + 906461325.

It is an arithmetic number, because the mean of its divisors is an integer number (6410768000).

Almost surely, 2^669874646484 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 669874646484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (923150592000).

669874646484 is an abundant number, since it is smaller than the sum of its proper divisors (1176426537516).

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

669874646484 is a wasteful number, since it uses less digits than its factorization.

669874646484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305 (or 1291 counting only the distinct ones).

The product of its digits is 1337720832, while the sum is 72.

The spelling of 669874646484 in words is "six hundred sixty-nine billion, eight hundred seventy-four million, six hundred forty-six thousand, four hundred eighty-four".