6640066316 has 24 divisors (see below), whose sum is σ = 12945490320. Its totient is φ = 2958967872.

The previous prime is 6640066291. The next prime is 6640066319. The reversal of 6640066316 is 6136600466.

It is a self number, because there is not a number n which added to its sum of digits gives 6640066316.

It is not an unprimeable number, because it can be changed into a prime (6640066319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2200106 + ... + 2203121.

It is an arithmetic number, because the mean of its divisors is an integer number (539395430).

Almost surely, 2^6640066316 is an apocalyptic number.

It is an amenable number.

6640066316 is a deficient number, since it is larger than the sum of its proper divisors (6305424004).

6640066316 is a wasteful number, since it uses less digits than its factorization.

6640066316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4403273 (or 4403271 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 6640066316 is about 81486.6020643885. The cubic root of 6640066316 is about 1879.5655322415.

The spelling of 6640066316 in words is "six billion, six hundred forty million, sixty-six thousand, three hundred sixteen".