6727979421 has 16 divisors (see below), whose sum is σ = 10019029120. Its totient is φ = 4462076160.

The previous prime is 6727979411. The next prime is 6727979429. The reversal of 6727979421 is 1249797276.

It is a de Polignac number, because none of the positive numbers 2^k-6727979421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6727979429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 640345 + ... + 650766.

It is an arithmetic number, because the mean of its divisors is an integer number (626189320).

Almost surely, 2^6727979421 is an apocalyptic number.

It is an amenable number.

6727979421 is a deficient number, since it is larger than the sum of its proper divisors (3291049699).

6727979421 is a wasteful number, since it uses less digits than its factorization.

6727979421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291313 (or 1291307 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 6727979421 is about 82024.2611731432. The cubic root of 6727979421 is about 1887.8242107057.

The spelling of 6727979421 in words is "six billion, seven hundred twenty-seven million, nine hundred seventy-nine thousand, four hundred twenty-one".