6680511861 has 8 divisors (see below), whose sum is σ = 8913485280. Its totient is φ = 4450606512.

The previous prime is 6680511857. The next prime is 6680511869. The reversal of 6680511861 is 1681150866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6680511861 - 2² = 6680511857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6680511869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761931 + ... + 770648.

It is an arithmetic number, because the mean of its divisors is an integer number (1114185660).

Almost surely, 2^6680511861 is an apocalyptic number.

It is an amenable number.

6680511861 is a deficient number, since it is larger than the sum of its proper divisors (2232973419).

6680511861 is a wasteful number, since it uses less digits than its factorization.

6680511861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534035.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 6680511861 is about 81734.3982726979. The cubic root of 6680511861 is about 1883.3740395375.

The spelling of 6680511861 in words is "six billion, six hundred eighty million, five hundred eleven thousand, eight hundred sixty-one".