6785221087 has 2 divisors, whose sum is σ = 6785221088. Its totient is φ = 6785221086.

The previous prime is 6785221039. The next prime is 6785221109. The reversal of 6785221087 is 7801225876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6785221087 - 2³¹ = 4637737439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6785221687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3392610543 + 3392610544.

It is an arithmetic number, because the mean of its divisors is an integer number (3392610544).

Almost surely, 2^6785221087 is an apocalyptic number.

6785221087 is a deficient number, since it is larger than the sum of its proper divisors (1).

6785221087 is an equidigital number, since it uses as much as digits as its factorization.

6785221087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 376320, while the sum is 46.

The square root of 6785221087 is about 82372.4534477394. The cubic root of 6785221087 is about 1893.1629695457.

The spelling of 6785221087 in words is "six billion, seven hundred eighty-five million, two hundred twenty-one thousand, eighty-seven".