663602245 has 8 divisors (see below), whose sum is σ = 805270680. Its totient is φ = 524916480.

The previous prime is 663602243. The next prime is 663602309. The reversal of 663602245 is 542206366.

It can be written as a sum of positive squares in 4 ways, for example, as 170851041 + 492751204 = 13071^2 + 22198^2 .

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

It is not a de Polignac number, because 663602245 - 2¹ = 663602243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 663602245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663602243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 745176 + ... + 746065.

It is an arithmetic number, because the mean of its divisors is an integer number (100658835).

Almost surely, 2^663602245 is an apocalyptic number.

It is an amenable number.

663602245 is a deficient number, since it is larger than the sum of its proper divisors (141668435).

663602245 is a wasteful number, since it uses less digits than its factorization.

663602245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491335.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 663602245 is about 25760.4783534778. The cubic root of 663602245 is about 872.2398991524.

The spelling of 663602245 in words is "six hundred sixty-three million, six hundred two thousand, two hundred forty-five".