6791201721 has 24 divisors (see below), whose sum is σ = 9914024640. Its totient is φ = 4479300000.

The previous prime is 6791201717. The next prime is 6791201731. The reversal of 6791201721 is 1271021976.

It is a happy number.

It is not a de Polignac number, because 6791201721 - 2² = 6791201717 is a prime.

It is a super-2 number, since 2×6791201721² = 92240841630626723682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6791201731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2044500 + ... + 2047818.

It is an arithmetic number, because the mean of its divisors is an integer number (413084360).

Almost surely, 2^6791201721 is an apocalyptic number.

It is an amenable number.

6791201721 is a deficient number, since it is larger than the sum of its proper divisors (3122822919).

6791201721 is a wasteful number, since it uses less digits than its factorization.

6791201721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5677 (or 5674 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 6791201721 is about 82408.7478426896. The cubic root of 6791201721 is about 1893.7190305166.

The spelling of 6791201721 in words is "six billion, seven hundred ninety-one million, two hundred one thousand, seven hundred twenty-one".