6606691 has 16 divisors (see below), whose sum is σ = 8243200. Its totient is φ = 5155488.

The previous prime is 6606679. The next prime is 6606731. The reversal of 6606691 is 1966066.

It is a happy number.

6606691 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6606691 - 2¹⁷ = 6475619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6606631) 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, 6730 + ... + 7648.

It is an arithmetic number, because the mean of its divisors is an integer number (515200).

Almost surely, 2^6606691 is an apocalyptic number.

6606691 is a deficient number, since it is larger than the sum of its proper divisors (1636509).

6606691 is a wasteful number, since it uses less digits than its factorization.

6606691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 6606691 is about 2570.3484199618. The cubic root of 6606691 is about 187.6411121430.

The spelling of 6606691 in words is "six million, six hundred six thousand, six hundred ninety-one".