6850221791 has 16 divisors (see below), whose sum is σ = 8725628160. Its totient is φ = 5235373440.

The previous prime is 6850221779. The next prime is 6850221799. The reversal of 6850221791 is 1971220586.

It is a cyclic number.

It is not a de Polignac number, because 6850221791 - 2¹⁴ = 6850205407 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 (6850221799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1512605 + ... + 1517126.

It is an arithmetic number, because the mean of its divisors is an integer number (545351760).

Almost surely, 2^6850221791 is an apocalyptic number.

6850221791 is a deficient number, since it is larger than the sum of its proper divisors (1875406369).

6850221791 is a wasteful number, since it uses less digits than its factorization.

6850221791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029774.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 6850221791 is about 82766.0666638206. The cubic root of 6850221791 is about 1899.1891083587.

The spelling of 6850221791 in words is "six billion, eight hundred fifty million, two hundred twenty-one thousand, seven hundred ninety-one".