663247406 has 32 divisors (see below), whose sum is σ = 1049340096. Its totient is φ = 314080000.

The previous prime is 663247397. The next prime is 663247411. The reversal of 663247406 is 604742366.

It is a self number, because there is not a number n which added to its sum of digits gives 663247406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438191 + ... + 439701.

It is an arithmetic number, because the mean of its divisors is an integer number (32791878).

Almost surely, 2^663247406 is an apocalyptic number.

663247406 is a deficient number, since it is larger than the sum of its proper divisors (386092690).

663247406 is a wasteful number, since it uses less digits than its factorization.

663247406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708.

The product of its (nonzero) digits is 145152, while the sum is 38.

The square root of 663247406 is about 25753.5901574907. The cubic root of 663247406 is about 872.0844044425.

The spelling of 663247406 in words is "six hundred sixty-three million, two hundred forty-seven thousand, four hundred six".