663675266 has 16 divisors (see below), whose sum is σ = 1043955000. Its totient is φ = 316003968.

The previous prime is 663675239. The next prime is 663675277. The reversal of 663675266 is 662576366.

It can be written as a sum of positive squares in 4 ways, for example, as 428697025 + 234978241 = 20705^2 + 15329^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 663675266.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74141 + ... + 82608.

Almost surely, 2^663675266 is an apocalyptic number.

663675266 is a deficient number, since it is larger than the sum of its proper divisors (380279734).

663675266 is a wasteful number, since it uses less digits than its factorization.

663675266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156853.

The product of its digits is 1632960, while the sum is 47.

The square root of 663675266 is about 25761.8956212465. The cubic root of 663675266 is about 872.2718909537.

The spelling of 663675266 in words is "six hundred sixty-three million, six hundred seventy-five thousand, two hundred sixty-six".