663925360 has 160 divisors (see below), whose sum is σ = 1938447360. Its totient is φ = 206198784.

The previous prime is 663925349. The next prime is 663925363. The reversal of 663925360 is 63529366.

It is a happy number.

It is a super-2 number, since 2×663925360² = 881593767302259200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663925363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 243364 + ... + 246076.

It is an arithmetic number, because the mean of its divisors is an integer number (12115296).

Almost surely, 2^663925360 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 663925360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (969223680).

663925360 is an abundant number, since it is smaller than the sum of its proper divisors (1274522000).

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

663925360 is a wasteful number, since it uses less digits than its factorization.

663925360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775 (or 2769 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 40.

The square root of 663925360 is about 25766.7491158664. The cubic root of 663925360 is about 872.3814438135.

The spelling of 663925360 in words is "six hundred sixty-three million, nine hundred twenty-five thousand, three hundred sixty".