6641672381 has 8 divisors (see below), whose sum is σ = 6699030624. Its totient is φ = 6584553360.

The previous prime is 6641672377. The next prime is 6641672393. The reversal of 6641672381 is 1832761466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6641672381 - 2² = 6641672377 is a prime.

It is a super-2 number, since 2×6641672381² = 88223624033076418322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6641672981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3815 + ... + 115316.

It is an arithmetic number, because the mean of its divisors is an integer number (837378828).

Almost surely, 2^6641672381 is an apocalyptic number.

It is an amenable number.

6641672381 is a deficient number, since it is larger than the sum of its proper divisors (57358243).

6641672381 is a wasteful number, since it uses less digits than its factorization.

6641672381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119611.

The product of its digits is 290304, while the sum is 44.

The square root of 6641672381 is about 81496.4562481093. The cubic root of 6641672381 is about 1879.7170598981.

The spelling of 6641672381 in words is "six billion, six hundred forty-one million, six hundred seventy-two thousand, three hundred eighty-one".