663690954 has 8 divisors (see below), whose sum is σ = 1327381920. Its totient is φ = 221230316.

The previous prime is 663690949. The next prime is 663690971. The reversal of 663690954 is 459096366.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

663690954 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 55307574 + ... + 55307585.

It is an arithmetic number, because the mean of its divisors is an integer number (165922740).

Almost surely, 2^663690954 is an apocalyptic number.

663690954 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

663690954 is a wasteful number, since it uses less digits than its factorization.

663690954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110615164.

The product of its (nonzero) digits is 1049760, while the sum is 48.

The square root of 663690954 is about 25762.2001001467. The cubic root of 663690954 is about 872.2787638399.

The spelling of 663690954 in words is "six hundred sixty-three million, six hundred ninety thousand, nine hundred fifty-four".