663147660 has 192 divisors, whose sum is σ = 2234179584. Its totient is φ = 143919360.

The previous prime is 663147659. The next prime is 663147689. The reversal of 663147660 is 66741366.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12512194 + ... + 12512246.

It is an arithmetic number, because the mean of its divisors is an integer number (11636352).

Almost surely, 2^663147660 is an apocalyptic number.

663147660 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 663147660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1117089792).

663147660 is an abundant number, since it is smaller than the sum of its proper divisors (1571031924).

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

663147660 is a wasteful number, since it uses less digits than its factorization.

663147660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 663147660 is about 25751.6535391419. The cubic root of 663147660 is about 872.0406845619.

The spelling of 663147660 in words is "six hundred sixty-three million, one hundred forty-seven thousand, six hundred sixty".