6779661 has 16 divisors (see below), whose sum is σ = 10425984. Its totient is φ = 3838464.

The previous prime is 6779657. The next prime is 6779671. The reversal of 6779661 is 1669776.

It is not a de Polignac number, because 6779661 - 2² = 6779657 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6779611) 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 15 ways as a sum of consecutive naturals, for example, 945 + ... + 3801.

It is an arithmetic number, because the mean of its divisors is an integer number (651624).

Almost surely, 2^6779661 is an apocalyptic number.

It is an amenable number.

6779661 is a deficient number, since it is larger than the sum of its proper divisors (3646323).

6779661 is a wasteful number, since it uses less digits than its factorization.

6779661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980.

The product of its digits is 95256, while the sum is 42.

The square root of 6779661 is about 2603.7782163618. The cubic root of 6779661 is about 189.2645716574.

The spelling of 6779661 in words is "six million, seven hundred seventy-nine thousand, six hundred sixty-one".