663397698240 has 784 divisors, whose sum is σ = 2453423348160. Its totient is φ = 170648985600.

The previous prime is 663397698233. The next prime is 663397698241. The reversal of 663397698240 is 42896793366.

It is not an unprimeable number, because it can be changed into a prime (663397698241) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 1303335106 + ... + 1303335614.

Almost surely, 2^663397698240 is an apocalyptic number.

663397698240 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 663397698240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1226711674080).

663397698240 is an abundant number, since it is smaller than the sum of its proper divisors (1790025649920).

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

663397698240 is a wasteful number, since it uses less digits than its factorization.

663397698240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 70543872, while the sum is 63.

The spelling of 663397698240 in words is "six hundred sixty-three billion, three hundred ninety-seven million, six hundred ninety-eight thousand, two hundred forty".