666019682496 has 280 divisors, whose sum is σ = 2257636043520. Its totient is φ = 190181426688.

The previous prime is 666019682441. The next prime is 666019682513. The reversal of 666019682496 is 694286910666.

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

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 39 ways as a sum of consecutive naturals, for example, 79067341 + ... + 79075763.

Almost surely, 2^666019682496 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 666019682496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1128818021760).

666019682496 is an abundant number, since it is smaller than the sum of its proper divisors (1591616361024).

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

666019682496 is a wasteful number, since it uses less digits than its factorization.

666019682496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10633 (or 10614 counting only the distinct ones).

The product of its (nonzero) digits is 40310784, while the sum is 63.

The spelling of 666019682496 in words is "six hundred sixty-six billion, nineteen million, six hundred eighty-two thousand, four hundred ninety-six".