6918081 has 4 divisors (see below), whose sum is σ = 9224112. Its totient is φ = 4612052.

The previous prime is 6918061. The next prime is 6918083. The reversal of 6918081 is 1808196.

6918081 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6918081 - 2⁶ = 6918017 is a prime.

It is a super-2 number, since 2×6918081² = 95719689445122, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6918083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1153011 + ... + 1153016.

It is an arithmetic number, because the mean of its divisors is an integer number (2306028).

Almost surely, 2^6918081 is an apocalyptic number.

6918081 is the 1664-th centered pentagonal number.

It is an amenable number.

6918081 is a deficient number, since it is larger than the sum of its proper divisors (2306031).

6918081 is a wasteful number, since it uses less digits than its factorization.

6918081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306030.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 6918081 is about 2630.2245151317. The cubic root of 6918081 is about 190.5439720485.

The spelling of 6918081 in words is "six million, nine hundred eighteen thousand, eighty-one".