6617220771 has 16 divisors (see below), whose sum is σ = 10147614464. Its totient is φ = 3757182624.

The previous prime is 6617220751. The next prime is 6617220781. The reversal of 6617220771 is 1770227166.

It is not a de Polignac number, because 6617220771 - 2¹¹ = 6617218723 is a prime.

It is a super-2 number, since 2×6617220771² = 87575221464307668882, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6617220721) 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, 1000225 + ... + 1006818.

It is an arithmetic number, because the mean of its divisors is an integer number (634225904).

Almost surely, 2^6617220771 is an apocalyptic number.

6617220771 is a deficient number, since it is larger than the sum of its proper divisors (3530393693).

6617220771 is a wasteful number, since it uses less digits than its factorization.

6617220771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007210.

The product of its (nonzero) digits is 49392, while the sum is 39.

The square root of 6617220771 is about 81346.3015201060. The cubic root of 6617220771 is about 1877.4074695164.

The spelling of 6617220771 in words is "six billion, six hundred seventeen million, two hundred twenty thousand, seven hundred seventy-one".