630752666 has 16 divisors (see below), whose sum is σ = 1010655144. Its totient is φ = 294196224.

The previous prime is 630752659. The next prime is 630752677. The reversal of 630752666 is 666257036.

It can be written as a sum of positive squares in 4 ways, for example, as 581822641 + 48930025 = 24121^2 + 6995^2 .

It is a super-2 number, since 2×630752666² = 795697851332215112, 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 7 ways as a sum of consecutive naturals, for example, 78245 + ... + 85928.

Almost surely, 2^630752666 is an apocalyptic number.

630752666 is a deficient number, since it is larger than the sum of its proper divisors (379902478).

630752666 is a wasteful number, since it uses less digits than its factorization.

630752666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164305.

The product of its (nonzero) digits is 272160, while the sum is 41.

The square root of 630752666 is about 25114.7897861001. The cubic root of 630752666 is about 857.6031448939.

The spelling of 630752666 in words is "six hundred thirty million, seven hundred fifty-two thousand, six hundred sixty-six".