663665255 has 8 divisors (see below), whose sum is σ = 868798224. Its totient is φ = 482665600.

The previous prime is 663665251. The next prime is 663665273. The reversal of 663665255 is 552566366.

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

It is not a de Polignac number, because 663665255 - 2² = 663665251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663665251) 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, 6033266 + ... + 6033375.

It is an arithmetic number, because the mean of its divisors is an integer number (108599778).

Almost surely, 2^663665255 is an apocalyptic number.

663665255 is a deficient number, since it is larger than the sum of its proper divisors (205132969).

663665255 is a wasteful number, since it uses less digits than its factorization.

663665255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12066657.

The product of its digits is 972000, while the sum is 44.

The square root of 663665255 is about 25761.7013219236. The cubic root of 663665255 is about 872.2675050950.

The spelling of 663665255 in words is "six hundred sixty-three million, six hundred sixty-five thousand, two hundred fifty-five".