6719940791 has 4 divisors (see below), whose sum is σ = 6736867992. Its totient is φ = 6703013592.

The previous prime is 6719940673. The next prime is 6719940827. The reversal of 6719940791 is 1970499176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6719940791 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 (6719940191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8463005 + ... + 8463798.

It is an arithmetic number, because the mean of its divisors is an integer number (1684216998).

Almost surely, 2^6719940791 is an apocalyptic number.

6719940791 is a deficient number, since it is larger than the sum of its proper divisors (16927201).

6719940791 is a wasteful number, since it uses less digits than its factorization.

6719940791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16927200.

The product of its (nonzero) digits is 857304, while the sum is 53.

The square root of 6719940791 is about 81975.2449889599. The cubic root of 6719940791 is about 1887.0720498496.

The spelling of 6719940791 in words is "six billion, seven hundred nineteen million, nine hundred forty thousand, seven hundred ninety-one".