6779961 has 6 divisors (see below), whose sum is σ = 9793290. Its totient is φ = 4519968.

The previous prime is 6779953. The next prime is 6779987. The reversal of 6779961 is 1699776.

It can be written as a sum of positive squares in only one way, i.e., 6471936 + 308025 = 2544^2 + 555^2 .

It is not a de Polignac number, because 6779961 - 2³ = 6779953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6779911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 376656 + ... + 376673.

It is an arithmetic number, because the mean of its divisors is an integer number (1632215).

Almost surely, 2^6779961 is an apocalyptic number.

It is an amenable number.

6779961 is a deficient number, since it is larger than the sum of its proper divisors (3013329).

6779961 is a wasteful number, since it uses less digits than its factorization.

6779961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753335 (or 753332 counting only the distinct ones).

The product of its digits is 142884, while the sum is 45.

The square root of 6779961 is about 2603.8358243177. The cubic root of 6779961 is about 189.2673632687.

The spelling of 6779961 in words is "six million, seven hundred seventy-nine thousand, nine hundred sixty-one".