6640655313 has 8 divisors (see below), whose sum is σ = 8975497888. Its totient is φ = 4366458144.

The previous prime is 6640655309. The next prime is 6640655387. The reversal of 6640655313 is 3135560466.

It is a happy number.

6640655313 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6640655313 - 2² = 6640655309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6640655303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15161095 + ... + 15161532.

It is an arithmetic number, because the mean of its divisors is an integer number (1121937236).

Almost surely, 2^6640655313 is an apocalyptic number.

It is an amenable number.

6640655313 is a deficient number, since it is larger than the sum of its proper divisors (2334842575).

6640655313 is a wasteful number, since it uses less digits than its factorization.

6640655313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30322703.

The product of its (nonzero) digits is 194400, while the sum is 39.

The square root of 6640655313 is about 81490.2160568985. The cubic root of 6640655313 is about 1879.6211052672.

The spelling of 6640655313 in words is "six billion, six hundred forty million, six hundred fifty-five thousand, three hundred thirteen".