6729665 has 4 divisors (see below), whose sum is σ = 8075604. Its totient is φ = 5383728.

The previous prime is 6729661. The next prime is 6729677. The reversal of 6729665 is 5669276.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2745649 + 3984016 = 1657^2 + 1996^2 .

It is a cyclic number.

It is not a de Polignac number, because 6729665 - 2² = 6729661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6729661) 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 3 ways as a sum of consecutive naturals, for example, 672962 + ... + 672971.

It is an arithmetic number, because the mean of its divisors is an integer number (2018901).

Almost surely, 2^6729665 is an apocalyptic number.

It is an amenable number.

6729665 is a deficient number, since it is larger than the sum of its proper divisors (1345939).

6729665 is a wasteful number, since it uses less digits than its factorization.

6729665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345938.

The product of its digits is 136080, while the sum is 41.

The square root of 6729665 is about 2594.1597869060. The cubic root of 6729665 is about 188.7981851455.

The spelling of 6729665 in words is "six million, seven hundred twenty-nine thousand, six hundred sixty-five".