6617381 has 6 divisors (see below), whose sum is σ = 6734982. Its totient is φ = 6501800.

The previous prime is 6617371. The next prime is 6617383. The reversal of 6617381 is 1837166.

It can be written as a sum of positive squares in only one way, i.e., 4264225 + 2353156 = 2065^2 + 1534^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6617381 is a prime.

It is a super-2 number, since 2×6617381² = 87579462598322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6617383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2531 + ... + 4431.

It is an arithmetic number, because the mean of its divisors is an integer number (1122497).

Almost surely, 2^6617381 is an apocalyptic number.

It is an amenable number.

6617381 is a deficient number, since it is larger than the sum of its proper divisors (117601).

6617381 is an equidigital number, since it uses as much as digits as its factorization.

6617381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019 (or 1960 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 6617381 is about 2572.4270640778. The cubic root of 6617381 is about 187.7422622539.

The spelling of 6617381 in words is "six million, six hundred seventeen thousand, three hundred eighty-one".