6715861 has 2 divisors, whose sum is σ = 6715862. Its totient is φ = 6715860.

The previous prime is 6715859. The next prime is 6715889. The reversal of 6715861 is 1685176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5202961 + 1512900 = 2281^2 + 1230^2 .

It is a cyclic number.

It is not a de Polignac number, because 6715861 - 2¹ = 6715859 is a prime.

Together with 6715859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6715801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3357930 + 3357931.

It is an arithmetic number, because the mean of its divisors is an integer number (3357931).

Almost surely, 2^6715861 is an apocalyptic number.

It is an amenable number.

6715861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6715861 is an equidigital number, since it uses as much as digits as its factorization.

6715861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 34.

The square root of 6715861 is about 2591.4978294415. The cubic root of 6715861 is about 188.6690081299.

The spelling of 6715861 in words is "six million, seven hundred fifteen thousand, eight hundred sixty-one".