6640573403 has 2 divisors, whose sum is σ = 6640573404. Its totient is φ = 6640573402.

The previous prime is 6640573327. The next prime is 6640573411. The reversal of 6640573403 is 3043750466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6640573403 - 2²⁴ = 6623796187 is a prime.

It is not a weakly prime, because it can be changed into another prime (6640573603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320286701 + 3320286702.

It is an arithmetic number, because the mean of its divisors is an integer number (3320286702).

Almost surely, 2^6640573403 is an apocalyptic number.

6640573403 is a deficient number, since it is larger than the sum of its proper divisors (1).

6640573403 is an equidigital number, since it uses as much as digits as its factorization.

6640573403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 38.

The square root of 6640573403 is about 81489.7134796779. The cubic root of 6640573403 is about 1879.6133770943.

The spelling of 6640573403 in words is "six billion, six hundred forty million, five hundred seventy-three thousand, four hundred three".