6640411623 has 8 divisors (see below), whose sum is σ = 8900238336. Its totient is φ = 4403763000.

The previous prime is 6640411601. The next prime is 6640411681. The reversal of 6640411623 is 3261140466.

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

It is not a de Polignac number, because 6640411623 - 2⁸ = 6640411367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640415623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5793853 + ... + 5794998.

It is an arithmetic number, because the mean of its divisors is an integer number (1112529792).

Almost surely, 2^6640411623 is an apocalyptic number.

6640411623 is a deficient number, since it is larger than the sum of its proper divisors (2259826713).

6640411623 is a wasteful number, since it uses less digits than its factorization.

6640411623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11589045.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 6640411623 is about 81488.7208330085. The cubic root of 6640411623 is about 1879.5981130348.

The spelling of 6640411623 in words is "six billion, six hundred forty million, four hundred eleven thousand, six hundred twenty-three".