6613881 has 24 divisors (see below), whose sum is σ = 9656064. Its totient is φ = 4021920.

The previous prime is 6613879. The next prime is 6613883. The reversal of 6613881 is 1883166.

It is an interprime number because it is at equal distance from previous prime (6613879) and next prime (6613883).

It is not a de Polignac number, because 6613881 - 2¹ = 6613879 is a prime.

It is a super-2 number, since 2×6613881² = 87486843764322, which contains 22 as substring.

6613881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6613883) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33475 + ... + 33671.

It is an arithmetic number, because the mean of its divisors is an integer number (402336).

Almost surely, 2^6613881 is an apocalyptic number.

It is an amenable number.

6613881 is a deficient number, since it is larger than the sum of its proper divisors (3042183).

6613881 is a wasteful number, since it uses less digits than its factorization.

6613881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 250 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 6613881 is about 2571.7466827042. The cubic root of 6613881 is about 187.7091568204.

The spelling of 6613881 in words is "six million, six hundred thirteen thousand, eight hundred eighty-one".