6640017413 has 4 divisors (see below), whose sum is σ = 6642806208. Its totient is φ = 6637228620.

The previous prime is 6640017409. The next prime is 6640017427. The reversal of 6640017413 is 3147100466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3147100466 = 2 ⋅1573550233.

It is a cyclic number.

It is not a de Polignac number, because 6640017413 - 2² = 6640017409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6640017413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640017493) 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 3 ways as a sum of consecutive naturals, for example, 1390823 + ... + 1395588.

It is an arithmetic number, because the mean of its divisors is an integer number (1660701552).

Almost surely, 2^6640017413 is an apocalyptic number.

It is an amenable number.

6640017413 is a deficient number, since it is larger than the sum of its proper divisors (2788795).

6640017413 is a wasteful number, since it uses less digits than its factorization.

6640017413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788794.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 6640017413 is about 81486.3019961024. The cubic root of 6640017413 is about 1879.5609179995.

Adding to 6640017413 its reverse (3147100466), we get a palindrome (9787117879).

The spelling of 6640017413 in words is "six billion, six hundred forty million, seventeen thousand, four hundred thirteen".