663055652985 has 48 divisors (see below), whose sum is σ = 1234695426048. Its totient is φ = 302570836480.

The previous prime is 663055652981. The next prime is 663055653011. The reversal of 663055652985 is 589256550366.

It is not a de Polignac number, because 663055652985 - 2² = 663055652981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (663055652981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10713849 + ... + 10775558.

It is an arithmetic number, because the mean of its divisors is an integer number (25722821376).

Almost surely, 2^663055652985 is an apocalyptic number.

It is an amenable number.

663055652985 is a deficient number, since it is larger than the sum of its proper divisors (571639773063).

663055652985 is a wasteful number, since it uses less digits than its factorization.

663055652985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21489454 (or 21489443 counting only the distinct ones).

The product of its (nonzero) digits is 58320000, while the sum is 60.

The spelling of 663055652985 in words is "six hundred sixty-three billion, fifty-five million, six hundred fifty-two thousand, nine hundred eighty-five".