6681840695 has 4 divisors (see below), whose sum is σ = 8018208840. Its totient is φ = 5345472552.

The previous prime is 6681840689. The next prime is 6681840731. The reversal of 6681840695 is 5960481866.

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 6681840695 - 2⁴ = 6681840679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668184065 + ... + 668184074.

It is an arithmetic number, because the mean of its divisors is an integer number (2004552210).

Almost surely, 2^6681840695 is an apocalyptic number.

6681840695 is a deficient number, since it is larger than the sum of its proper divisors (1336368145).

6681840695 is a wasteful number, since it uses less digits than its factorization.

6681840695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336368144.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The square root of 6681840695 is about 81742.5268449661. The cubic root of 6681840695 is about 1883.4989064933.

The spelling of 6681840695 in words is "six billion, six hundred eighty-one million, eight hundred forty thousand, six hundred ninety-five".