6688700671 has 4 divisors (see below), whose sum is σ = 6689010600. Its totient is φ = 6688390744.

The previous prime is 6688700657. The next prime is 6688700713. The reversal of 6688700671 is 1760078866.

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 6688700671 - 2⁹ = 6688700159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6688760671) 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, 119956 + ... + 166633.

It is an arithmetic number, because the mean of its divisors is an integer number (1672252650).

Almost surely, 2^6688700671 is an apocalyptic number.

6688700671 is a deficient number, since it is larger than the sum of its proper divisors (309929).

6688700671 is a wasteful number, since it uses less digits than its factorization.

6688700671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309928.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 6688700671 is about 81784.4769562048. The cubic root of 6688700671 is about 1884.1432567886.

The spelling of 6688700671 in words is "six billion, six hundred eighty-eight million, seven hundred thousand, six hundred seventy-one".