669020044320 has 720 divisors, whose sum is σ = 2511042545088. Its totient is φ = 167718988800.

The previous prime is 669020044307. The next prime is 669020044331. The reversal of 669020044320 is 23440020966.

669020044320 is a `hidden beast` number, since 6 + 6 + 9 + 0 + 200 + 443 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 706462087 + ... + 706463033.

Almost surely, 2^669020044320 is an apocalyptic number.

669020044320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669020044320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1255521272544).

669020044320 is an abundant number, since it is smaller than the sum of its proper divisors (1842022500768).

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

669020044320 is a wasteful number, since it uses less digits than its factorization.

669020044320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 669020044320 in words is "six hundred sixty-nine billion, twenty million, forty-four thousand, three hundred twenty".