6680206679 has 4 divisors (see below), whose sum is σ = 6822338784. Its totient is φ = 6538074576.

The previous prime is 6680206651. The next prime is 6680206693. The reversal of 6680206679 is 9766020866.

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

It is a cyclic number.

It is not a de Polignac number, because 6680206679 - 2¹² = 6680202583 is a prime.

It is a super-2 number, since 2×6680206679² = 89250322548312418082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6680206609) 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, 71065982 + ... + 71066075.

It is an arithmetic number, because the mean of its divisors is an integer number (1705584696).

Almost surely, 2^6680206679 is an apocalyptic number.

6680206679 is a deficient number, since it is larger than the sum of its proper divisors (142132105).

6680206679 is a wasteful number, since it uses less digits than its factorization.

6680206679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142132104.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 6680206679 is about 81732.5313385068. The cubic root of 6680206679 is about 1883.3453600680.

The spelling of 6680206679 in words is "six billion, six hundred eighty million, two hundred six thousand, six hundred seventy-nine".