663281264 has 10 divisors (see below), whose sum is σ = 1285107480. Its totient is φ = 331640624.

The previous prime is 663281263. The next prime is 663281309. The reversal of 663281264 is 462182366.

663281264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663281261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20727524 + ... + 20727555.

It is an arithmetic number, because the mean of its divisors is an integer number (128510748).

Almost surely, 2^663281264 is an apocalyptic number.

It is an amenable number.

663281264 is a deficient number, since it is larger than the sum of its proper divisors (621826216).

663281264 is a wasteful number, since it uses less digits than its factorization.

663281264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41455087 (or 41455081 counting only the distinct ones).

The product of its digits is 82944, while the sum is 38.

The square root of 663281264 is about 25754.2474943455. The cubic root of 663281264 is about 872.0992438177.

The spelling of 663281264 in words is "six hundred sixty-three million, two hundred eighty-one thousand, two hundred sixty-four".