646662712 has 32 divisors (see below), whose sum is σ = 1222688880. Its totient is φ = 320624640.

The previous prime is 646662703. The next prime is 646662713. The reversal of 646662712 is 217266646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646662713) 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 7 ways as a sum of consecutive naturals, for example, 757678 + ... + 758530.

Almost surely, 2^646662712 is an apocalyptic number.

It is an amenable number.

646662712 is a deficient number, since it is larger than the sum of its proper divisors (576026168).

646662712 is a wasteful number, since it uses less digits than its factorization.

646662712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543 (or 1539 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 646662712 is about 25429.5637398678. The cubic root of 646662712 is about 864.7540535018.

The spelling of 646662712 in words is "six hundred forty-six million, six hundred sixty-two thousand, seven hundred twelve".