663260613 has 8 divisors (see below), whose sum is σ = 886046976. Its totient is φ = 441324000.

The previous prime is 663260597. The next prime is 663260621. The reversal of 663260613 is 316062366.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 663260613 - 2⁴ = 663260597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663260513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210613 + ... + 213738.

It is an arithmetic number, because the mean of its divisors is an integer number (110755872).

Almost surely, 2^663260613 is an apocalyptic number.

It is an amenable number.

663260613 is a deficient number, since it is larger than the sum of its proper divisors (222786363).

663260613 is a wasteful number, since it uses less digits than its factorization.

663260613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424875.

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 663260613 is about 25753.8465670664. The cubic root of 663260613 is about 872.0901929020.

The spelling of 663260613 in words is "six hundred sixty-three million, two hundred sixty thousand, six hundred thirteen".