633442666 has 8 divisors (see below), whose sum is σ = 965740644. Its totient is φ = 311529120.

The previous prime is 633442651. The next prime is 633442751. The reversal of 633442666 is 666244336.

It can be written as a sum of positive squares in 2 ways, for example, as 618964641 + 14478025 = 24879^2 + 3805^2 .

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

It is a super-2 number, since 2×633442666² = 802499222218375112, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2595955 + ... + 2596198.

Almost surely, 2^633442666 is an apocalyptic number.

633442666 is a deficient number, since it is larger than the sum of its proper divisors (332297978).

633442666 is a wasteful number, since it uses less digits than its factorization.

633442666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5192216.

The product of its digits is 373248, while the sum is 40.

The square root of 633442666 is about 25168.2869103163. The cubic root of 633442666 is about 858.8205690972.

The spelling of 633442666 in words is "six hundred thirty-three million, four hundred forty-two thousand, six hundred sixty-six".