6640143371 has 2 divisors, whose sum is σ = 6640143372. Its totient is φ = 6640143370.

The previous prime is 6640143359. The next prime is 6640143421. The reversal of 6640143371 is 1733410466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6640143371 - 2¹⁰ = 6640142347 is a prime.

It is not a weakly prime, because it can be changed into another prime (6640143571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320071685 + 3320071686.

It is an arithmetic number, because the mean of its divisors is an integer number (3320071686).

Almost surely, 2^6640143371 is an apocalyptic number.

6640143371 is a deficient number, since it is larger than the sum of its proper divisors (1).

6640143371 is an equidigital number, since it uses as much as digits as its factorization.

6640143371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 6640143371 is about 81487.0748708039. The cubic root of 6640143371 is about 1879.5728027192.

The spelling of 6640143371 in words is "six billion, six hundred forty million, one hundred forty-three thousand, three hundred seventy-one".