6726486779 has 4 divisors (see below), whose sum is σ = 6793085760. Its totient is φ = 6659887800.

The previous prime is 6726486731. The next prime is 6726486787. The reversal of 6726486779 is 9776846276.

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-6726486779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6726486719) 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, 33299339 + ... + 33299540.

It is an arithmetic number, because the mean of its divisors is an integer number (1698271440).

Almost surely, 2^6726486779 is an apocalyptic number.

6726486779 is a deficient number, since it is larger than the sum of its proper divisors (66598981).

6726486779 is a wasteful number, since it uses less digits than its factorization.

6726486779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66598980.

The product of its digits is 42674688, while the sum is 62.

The square root of 6726486779 is about 82015.1618848613. The cubic root of 6726486779 is about 1887.6845920604.

The spelling of 6726486779 in words is "six billion, seven hundred twenty-six million, four hundred eighty-six thousand, seven hundred seventy-nine".