663573704 has 8 divisors (see below), whose sum is σ = 1244200710. Its totient is φ = 331786848.

The previous prime is 663573671. The next prime is 663573709. The reversal of 663573704 is 407375366.

It can be written as a sum of positive squares in only one way, i.e., 602702500 + 60871204 = 24550^2 + 7802^2 .

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

It is not an unprimeable number, because it can be changed into a prime (663573709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41473349 + ... + 41473364.

Almost surely, 2^663573704 is an apocalyptic number.

It is an amenable number.

663573704 is a deficient number, since it is larger than the sum of its proper divisors (580627006).

663573704 is a wasteful number, since it uses less digits than its factorization.

663573704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82946719 (or 82946715 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 41.

The square root of 663573704 is about 25759.9243787710. The cubic root of 663573704 is about 872.2273941937.

The spelling of 663573704 in words is "six hundred sixty-three million, five hundred seventy-three thousand, seven hundred four".