663654516 has 48 divisors (see below), whose sum is σ = 1772305920. Its totient is φ = 189341280.

The previous prime is 663654491. The next prime is 663654539. The reversal of 663654516 is 615456366.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56731 + ... + 67421.

It is an arithmetic number, because the mean of its divisors is an integer number (36923040).

Almost surely, 2^663654516 is an apocalyptic number.

It is an amenable number.

663654516 is an abundant number, since it is smaller than the sum of its proper divisors (1108651404).

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

663654516 is a wasteful number, since it uses less digits than its factorization.

663654516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11444 (or 11442 counting only the distinct ones).

The product of its digits is 388800, while the sum is 42.

The square root of 663654516 is about 25761.4928915232. The cubic root of 663654516 is about 872.2628002476.

The spelling of 663654516 in words is "six hundred sixty-three million, six hundred fifty-four thousand, five hundred sixteen".