6641731975 has 6 divisors (see below), whose sum is σ = 8235747680. Its totient is φ = 5313385560.

The previous prime is 6641731949. The next prime is 6641731997. The reversal of 6641731975 is 5791371466.

It is not a de Polignac number, because 6641731975 - 2¹⁹ = 6641207687 is a prime.

It is a super-2 number, since 2×6641731975² = 88225207255474801250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132834615 + ... + 132834664.

Almost surely, 2^6641731975 is an apocalyptic number.

6641731975 is a deficient number, since it is larger than the sum of its proper divisors (1594015705).

6641731975 is a wasteful number, since it uses less digits than its factorization.

6641731975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265669289 (or 265669284 counting only the distinct ones).

The product of its digits is 952560, while the sum is 49.

The square root of 6641731975 is about 81496.8218705490. The cubic root of 6641731975 is about 1879.7226819522.

The spelling of 6641731975 in words is "six billion, six hundred forty-one million, seven hundred thirty-one thousand, nine hundred seventy-five".