663664862 has 32 divisors (see below), whose sum is σ = 1189209600. Its totient is φ = 271595808.

The previous prime is 663664861. The next prime is 663664873. The reversal of 663664862 is 268466366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663664861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236564 + ... + 239352.

It is an arithmetic number, because the mean of its divisors is an integer number (37162800).

Almost surely, 2^663664862 is an apocalyptic number.

663664862 is a deficient number, since it is larger than the sum of its proper divisors (525544738).

663664862 is a wasteful number, since it uses less digits than its factorization.

663664862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3560.

The product of its digits is 1492992, while the sum is 47.

The square root of 663664862 is about 25761.6936943206. The cubic root of 663664862 is about 872.2673329193.

The spelling of 663664862 in words is "six hundred sixty-three million, six hundred sixty-four thousand, eight hundred sixty-two".