6617220681 has 8 divisors (see below), whose sum is σ = 9206568000. Its totient is φ = 4219676912.

The previous prime is 6617220671. The next prime is 6617220689. The reversal of 6617220681 is 1860227166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6617220681 - 2²⁵ = 6583666249 is a prime.

It is a super-2 number, since 2×6617220681² = 87575219082108207522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6617220689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47950806 + ... + 47950943.

It is an arithmetic number, because the mean of its divisors is an integer number (1150821000).

Almost surely, 2^6617220681 is an apocalyptic number.

It is an amenable number.

6617220681 is a deficient number, since it is larger than the sum of its proper divisors (2589347319).

6617220681 is a wasteful number, since it uses less digits than its factorization.

6617220681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95901775.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 6617220681 is about 81346.3009669155. The cubic root of 6617220681 is about 1877.4074610049.

The spelling of 6617220681 in words is "six billion, six hundred seventeen million, two hundred twenty thousand, six hundred eighty-one".