6786680661 has 24 divisors (see below), whose sum is σ = 10701119520. Its totient is φ = 4286321712.

The previous prime is 6786680657. The next prime is 6786680689. The reversal of 6786680661 is 1660866876.

It is not a de Polignac number, because 6786680661 - 2² = 6786680657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6786680598 and 6786680607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6786680561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 730350 + ... + 739583.

It is an arithmetic number, because the mean of its divisors is an integer number (445879980).

Almost surely, 2^6786680661 is an apocalyptic number.

It is an amenable number.

6786680661 is a deficient number, since it is larger than the sum of its proper divisors (3914438859).

6786680661 is a wasteful number, since it uses less digits than its factorization.

6786680661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469967 (or 1469955 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The square root of 6786680661 is about 82381.3125714807. The cubic root of 6786680661 is about 1893.2987063824.

The spelling of 6786680661 in words is "six billion, seven hundred eighty-six million, six hundred eighty thousand, six hundred sixty-one".