6820766 has 4 divisors (see below), whose sum is σ = 10231152. Its totient is φ = 3410382.

The previous prime is 6820741. The next prime is 6820769. The reversal of 6820766 is 6670286.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6820769) 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 as a sum of consecutive naturals, namely, 1705190 + ... + 1705193.

It is an arithmetic number, because the mean of its divisors is an integer number (2557788).

Almost surely, 2^6820766 is an apocalyptic number.

6820766 is a deficient number, since it is larger than the sum of its proper divisors (3410386).

6820766 is a wasteful number, since it uses less digits than its factorization.

6820766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410385.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 6820766 is about 2611.6596256021. The cubic root of 6820766 is about 189.6463041256.

The spelling of 6820766 in words is "six million, eight hundred twenty thousand, seven hundred sixty-six".