663304601 has 4 divisors (see below), whose sum is σ = 679482804. Its totient is φ = 647126400.

The previous prime is 663304571. The next prime is 663304637. The reversal of 663304601 is 106403366.

663304601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 200194201 + 463110400 = 14149^2 + 21520^2 .

It is a cyclic number.

It is not a de Polignac number, because 663304601 - 2²² = 659110297 is a prime.

It is a super-3 number, since 3×663304601³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663304651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8089040 + ... + 8089121.

It is an arithmetic number, because the mean of its divisors is an integer number (169870701).

Almost surely, 2^663304601 is an apocalyptic number.

It is an amenable number.

663304601 is a deficient number, since it is larger than the sum of its proper divisors (16178203).

663304601 is a wasteful number, since it uses less digits than its factorization.

663304601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16178202.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 663304601 is about 25754.7005612568. The cubic root of 663304601 is about 872.1094717267.

Adding to 663304601 its reverse (106403366), we get a palindrome (769707967).

The spelling of 663304601 in words is "six hundred sixty-three million, three hundred four thousand, six hundred one".