669366996480 has 1600 divisors, whose sum is σ = 3107686095360. Its totient is φ = 133724307456.

The previous prime is 669366996479. The next prime is 669366996509. The reversal of 669366996480 is 84699663966.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 669366996399 and 669366996408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 358524507 + ... + 358526373.

Almost surely, 2^669366996480 is an apocalyptic number.

669366996480 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 669366996480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1553843047680).

669366996480 is an abundant number, since it is smaller than the sum of its proper divisors (2438319098880).

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

669366996480 is a wasteful number, since it uses less digits than its factorization.

669366996480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941 (or 1916 counting only the distinct ones).

The product of its (nonzero) digits is 544195584, while the sum is 72.

The spelling of 669366996480 in words is "six hundred sixty-nine billion, three hundred sixty-six million, nine hundred ninety-six thousand, four hundred eighty".