6640246316 has 24 divisors (see below), whose sum is σ = 12855386880. Its totient is φ = 2975781200.

The previous prime is 6640246309. The next prime is 6640246321. The reversal of 6640246316 is 6136420466.

It is a happy number.

It is a super-2 number, since 2×6640246316² = 88185742274303143712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6640246316.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1059656 + ... + 1065903.

It is an arithmetic number, because the mean of its divisors is an integer number (535641120).

Almost surely, 2^6640246316 is an apocalyptic number.

It is an amenable number.

6640246316 is a deficient number, since it is larger than the sum of its proper divisors (6215140564).

6640246316 is a wasteful number, since it uses less digits than its factorization.

6640246316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125645 (or 2125643 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 6640246316 is about 81487.7065329489. The cubic root of 6640246316 is about 1879.5825159443.

The spelling of 6640246316 in words is "six billion, six hundred forty million, two hundred forty-six thousand, three hundred sixteen".