6640614823 has 2 divisors, whose sum is σ = 6640614824. Its totient is φ = 6640614822.

The previous prime is 6640614797. The next prime is 6640614881. The reversal of 6640614823 is 3284160466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6640614823 - 2¹³ = 6640606631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6640614223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320307411 + 3320307412.

It is an arithmetic number, because the mean of its divisors is an integer number (3320307412).

Almost surely, 2^6640614823 is an apocalyptic number.

6640614823 is a deficient number, since it is larger than the sum of its proper divisors (1).

6640614823 is an equidigital number, since it uses as much as digits as its factorization.

6640614823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 6640614823 is about 81489.9676217877. The cubic root of 6640614823 is about 1879.6172850612.

The spelling of 6640614823 in words is "six billion, six hundred forty million, six hundred fourteen thousand, eight hundred twenty-three".