663276664 has 8 divisors (see below), whose sum is σ = 1243643760. Its totient is φ = 331638328.

The previous prime is 663276623. The next prime is 663276697. The reversal of 663276664 is 466672366.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41454784 + ... + 41454799.

It is an arithmetic number, because the mean of its divisors is an integer number (155455470).

Almost surely, 2^663276664 is an apocalyptic number.

It is an amenable number.

663276664 is a deficient number, since it is larger than the sum of its proper divisors (580367096).

663276664 is a wasteful number, since it uses less digits than its factorization.

663276664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82909589 (or 82909585 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 46.

The square root of 663276664 is about 25754.1581885334. The cubic root of 663276664 is about 872.0972277470.

The spelling of 663276664 in words is "six hundred sixty-three million, two hundred seventy-six thousand, six hundred sixty-four".