6617620 has 24 divisors (see below), whose sum is σ = 13948200. Its totient is φ = 2637312.

The previous prime is 6617603. The next prime is 6617627. The reversal of 6617620 is 267166.

It can be written as a sum of positive squares in 4 ways, for example, as 3283344 + 3334276 = 1812^2 + 1826^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6617627) 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 7 ways as a sum of consecutive naturals, for example, 7776 + ... + 8584.

It is an arithmetic number, because the mean of its divisors is an integer number (581175).

Almost surely, 2^6617620 is an apocalyptic number.

It is an amenable number.

6617620 is an abundant number, since it is smaller than the sum of its proper divisors (7330580).

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

6617620 is a wasteful number, since it uses less digits than its factorization.

6617620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227 (or 1225 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 6617620 is about 2572.4735178423. The cubic root of 6617620 is about 187.7445224563.

It can be divided in two parts, 661 and 7620, that added together give a square (8281 = 91²).

The spelling of 6617620 in words is "six million, six hundred seventeen thousand, six hundred twenty".