6928661 has 2 divisors, whose sum is σ = 6928662. Its totient is φ = 6928660.

The previous prime is 6928643. The next prime is 6928667. The reversal of 6928661 is 1668296.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6604900 + 323761 = 2570^2 + 569^2 .

It is a cyclic number.

It is not a de Polignac number, because 6928661 - 2¹⁰ = 6927637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6928667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3464330 + 3464331.

It is an arithmetic number, because the mean of its divisors is an integer number (3464331).

Almost surely, 2^6928661 is an apocalyptic number.

It is an amenable number.

6928661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6928661 is an equidigital number, since it uses as much as digits as its factorization.

6928661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 6928661 is about 2632.2349819118. The cubic root of 6928661 is about 190.6410571800.

The spelling of 6928661 in words is "six million, nine hundred twenty-eight thousand, six hundred sixty-one".