690666632 has 48 divisors (see below), whose sum is σ = 1360811340. Its totient is φ = 328600448.

The previous prime is 690666631. The next prime is 690666649. The reversal of 690666632 is 236666096.

It can be written as a sum of positive squares in 2 ways, for example, as 689902756 + 763876 = 26266^2 + 874^2 .

It is not an unprimeable number, because it can be changed into a prime (690666631) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1239698 + ... + 1240254.

Almost surely, 2^690666632 is an apocalyptic number.

It is an amenable number.

690666632 is a deficient number, since it is larger than the sum of its proper divisors (670144708).

690666632 is a wasteful number, since it uses less digits than its factorization.

690666632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 44.

The square root of 690666632 is about 26280.5371330192. The cubic root of 690666632 is about 883.9400770176.

The spelling of 690666632 in words is "six hundred ninety million, six hundred sixty-six thousand, six hundred thirty-two".