663674426 has 8 divisors (see below), whose sum is σ = 995811924. Its totient is φ = 331737120.

The previous prime is 663674413. The next prime is 663674489. The reversal of 663674426 is 624476366.

It can be written as a sum of positive squares in 2 ways, for example, as 652751401 + 10923025 = 25549^2 + 3305^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41465 + ... + 55196.

Almost surely, 2^663674426 is an apocalyptic number.

663674426 is a deficient number, since it is larger than the sum of its proper divisors (332137498).

663674426 is a wasteful number, since it uses less digits than its factorization.

663674426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100096.

The product of its digits is 870912, while the sum is 44.

The square root of 663674426 is about 25761.8793180932. The cubic root of 663674426 is about 872.2715229481.

The spelling of 663674426 in words is "six hundred sixty-three million, six hundred seventy-four thousand, four hundred twenty-six".