6671138494 has 4 divisors (see below), whose sum is σ = 10006707744. Its totient is φ = 3335569246.

The previous prime is 6671138483. The next prime is 6671138519. The reversal of 6671138494 is 4948311766.

6671138494 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4948311766 = 2 ⋅2474155883.

It is a super-2 number, since 2×6671138494² = 89008177612257176072, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1667784622 + ... + 1667784625.

It is an arithmetic number, because the mean of its divisors is an integer number (2501676936).

Almost surely, 2^6671138494 is an apocalyptic number.

6671138494 is a deficient number, since it is larger than the sum of its proper divisors (3335569250).

6671138494 is a wasteful number, since it uses less digits than its factorization.

6671138494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335569249.

The product of its digits is 870912, while the sum is 49.

The square root of 6671138494 is about 81677.0377401140. The cubic root of 6671138494 is about 1882.4927787700.

The spelling of 6671138494 in words is "six billion, six hundred seventy-one million, one hundred thirty-eight thousand, four hundred ninety-four".