6978081 has 8 divisors (see below), whose sum is σ = 10149984. Its totient is φ = 4229120.

The previous prime is 6978061. The next prime is 6978091. The reversal of 6978081 is 1808796.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6978081 - 2⁹ = 6977569 is a prime.

It is a super-2 number, since 2×6978081² = 97387228885122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6978001) 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, 105696 + ... + 105761.

It is an arithmetic number, because the mean of its divisors is an integer number (1268748).

Almost surely, 2^6978081 is an apocalyptic number.

It is an amenable number.

6978081 is a deficient number, since it is larger than the sum of its proper divisors (3171903).

6978081 is a wasteful number, since it uses less digits than its factorization.

6978081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211471.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 6978081 is about 2641.6057616533. The cubic root of 6978081 is about 191.0932450423.

It can be divided in two parts, 697 and 8081, that added together give a palindrome (8778).

The spelling of 6978081 in words is "six million, nine hundred seventy-eight thousand, eighty-one".