6641999910 has 96 divisors (see below), whose sum is σ = 21254425920. Its totient is φ = 1401387264.

The previous prime is 6641999873. The next prime is 6641999951. The reversal of 6641999910 is 199991466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 397305 + ... + 413684.

It is an arithmetic number, because the mean of its divisors is an integer number (221400270).

Almost surely, 2^6641999910 is an apocalyptic number.

6641999910 is an abundant number, since it is smaller than the sum of its proper divisors (14612426010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6641999910 is a wasteful number, since it uses less digits than its factorization.

6641999910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811022 (or 811019 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The square root of 6641999910 is about 81498.4656910791. The cubic root of 6641999910 is about 1879.7479583272.

The spelling of 6641999910 in words is "six billion, six hundred forty-one million, nine hundred ninety-nine thousand, nine hundred ten".