669712784832 has 1680 divisors, whose sum is σ = 2702498154048. Its totient is φ = 159093227520.

The previous prime is 669712784831. The next prime is 669712784879. The reversal of 669712784832 is 238487217966.

669712784832 is a `hidden beast` number, since 6 + 69 + 71 + 27 + 8 + 483 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (48771072) is a multiple of the sum of its prime factors (196).

It is a self number, because there is not a number n which added to its sum of digits gives 669712784832.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669712784831) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 10978898082 + ... + 10978898142.

Almost surely, 2^669712784832 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 669712784832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1351249077024).

669712784832 is an abundant number, since it is smaller than the sum of its proper divisors (2032785369216).

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

669712784832 is a wasteful number, since it uses less digits than its factorization.

669712784832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 140 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 63.

The spelling of 669712784832 in words is "six hundred sixty-nine billion, seven hundred twelve million, seven hundred eighty-four thousand, eight hundred thirty-two".