6640116358 has 4 divisors (see below), whose sum is σ = 9960174540. Its totient is φ = 3320058178.

The previous prime is 6640116349. The next prime is 6640116367. The reversal of 6640116358 is 8536110466.

6640116358 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6640116349) and next prime (6640116367).

It is a super-2 number, since 2×6640116358² = 88182290495558368328, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 6640116358.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1660029088 + ... + 1660029091.

It is an arithmetic number, because the mean of its divisors is an integer number (2490043635).

Almost surely, 2^6640116358 is an apocalyptic number.

6640116358 is a deficient number, since it is larger than the sum of its proper divisors (3320058182).

6640116358 is a wasteful number, since it uses less digits than its factorization.

6640116358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320058181.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 6640116358 is about 81486.9091204225. The cubic root of 6640116358 is about 1879.5702539304.

The spelling of 6640116358 in words is "six billion, six hundred forty million, one hundred sixteen thousand, three hundred fifty-eight".