6791390686 has 4 divisors (see below), whose sum is σ = 10187086032. Its totient is φ = 3395695342.

The previous prime is 6791390623. The next prime is 6791390699. The reversal of 6791390686 is 6860931976.

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

It is a super-2 number, since 2×6791390686² = 92245974899775101192, which contains 22 as substring.

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, 1697847670 + ... + 1697847673.

It is an arithmetic number, because the mean of its divisors is an integer number (2546771508).

Almost surely, 2^6791390686 is an apocalyptic number.

6791390686 is a deficient number, since it is larger than the sum of its proper divisors (3395695346).

6791390686 is a wasteful number, since it uses less digits than its factorization.

6791390686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3395695345.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The square root of 6791390686 is about 82409.8943452787. The cubic root of 6791390686 is about 1893.7365945803.

The spelling of 6791390686 in words is "six billion, seven hundred ninety-one million, three hundred ninety thousand, six hundred eighty-six".