6617920 has 28 divisors (see below), whose sum is σ = 15759684. Its totient is φ = 2647040.

The previous prime is 6617917. The next prime is 6617921. The reversal of 6617920 is 297166.

It can be written as a sum of positive squares in 2 ways, for example, as 1382976 + 5234944 = 1176^2 + 2288^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6617921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10021 + ... + 10660.

Almost surely, 2^6617920 is an apocalyptic number.

It is an amenable number.

6617920 is an abundant number, since it is smaller than the sum of its proper divisors (9141764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6617920 is a wasteful number, since it uses less digits than its factorization.

6617920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20698 (or 20688 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 6617920 is about 2572.5318268196. The cubic root of 6617920 is about 187.7473594534.

The spelling of 6617920 in words is "six million, six hundred seventeen thousand, nine hundred twenty".