6978771 has 16 divisors (see below), whose sum is σ = 10581120. Its totient is φ = 4543560.

The previous prime is 6978761. The next prime is 6978779. The reversal of 6978771 is 1778796.

It is a happy number.

It is not a de Polignac number, because 6978771 - 2⁵ = 6978739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6978779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1845 + ... + 4166.

It is an arithmetic number, because the mean of its divisors is an integer number (661320).

Almost surely, 2^6978771 is an apocalyptic number.

6978771 is a deficient number, since it is larger than the sum of its proper divisors (3602349).

6978771 is a wasteful number, since it uses less digits than its factorization.

6978771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6063 (or 6057 counting only the distinct ones).

The product of its digits is 148176, while the sum is 45.

The square root of 6978771 is about 2641.7363608051. The cubic root of 6978771 is about 191.0995433351.

The spelling of 6978771 in words is "six million, nine hundred seventy-eight thousand, seven hundred seventy-one".