663997333340 has 24 divisors (see below), whose sum is σ = 1521157527792. Its totient is φ = 241453575680.

The previous prime is 663997333297. The next prime is 663997333357. The reversal of 663997333340 is 43333799366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1509084629 + ... + 1509085068.

It is an arithmetic number, because the mean of its divisors is an integer number (63381563658).

Almost surely, 2^663997333340 is an apocalyptic number.

It is an amenable number.

663997333340 is an abundant number, since it is smaller than the sum of its proper divisors (857160194452).

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

663997333340 is a wasteful number, since it uses less digits than its factorization.

663997333340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3018169717 (or 3018169715 counting only the distinct ones).

The product of its (nonzero) digits is 19840464, while the sum is 56.

The spelling of 663997333340 in words is "six hundred sixty-three billion, nine hundred ninety-seven million, three hundred thirty-three thousand, three hundred forty".