663431676 has 24 divisors (see below), whose sum is σ = 1548484560. Its totient is φ = 221075712.

The previous prime is 663431663. The next prime is 663431677. The reversal of 663431676 is 676134366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663431677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45940 + ... + 58628.

It is an arithmetic number, because the mean of its divisors is an integer number (64520190).

Almost surely, 2^663431676 is an apocalyptic number.

It is an amenable number.

663431676 is an abundant number, since it is smaller than the sum of its proper divisors (885052884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663431676 is a wasteful number, since it uses less digits than its factorization.

663431676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17053 (or 17051 counting only the distinct ones).

The product of its digits is 326592, while the sum is 42.

The square root of 663431676 is about 25757.1674684931. The cubic root of 663431676 is about 872.1651606890.

The spelling of 663431676 in words is "six hundred sixty-three million, four hundred thirty-one thousand, six hundred seventy-six".