663366674 has 4 divisors (see below), whose sum is σ = 995050014. Its totient is φ = 331683336.

The previous prime is 663366647. The next prime is 663366689. The reversal of 663366674 is 476663366.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 658281649 + 5085025 = 25657^2 + 2255^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165841667 + ... + 165841670.

Almost surely, 2^663366674 is an apocalyptic number.

663366674 is a deficient number, since it is larger than the sum of its proper divisors (331683340).

663366674 is a wasteful number, since it uses less digits than its factorization.

663366674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331683339.

The product of its digits is 1959552, while the sum is 47.

The square root of 663366674 is about 25755.9056140529. The cubic root of 663366674 is about 872.1366752984.

The spelling of 663366674 in words is "six hundred sixty-three million, three hundred sixty-six thousand, six hundred seventy-four".