729666826 has 32 divisors (see below), whose sum is σ = 1326084480. Its totient is φ = 293953536.

The previous prime is 729666797. The next prime is 729666827. The reversal of 729666826 is 628666927.

It is not an unprimeable number, because it can be changed into a prime (729666827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273085 + ... + 275743.

It is an arithmetic number, because the mean of its divisors is an integer number (41440140).

Almost surely, 2^729666826 is an apocalyptic number.

729666826 is a deficient number, since it is larger than the sum of its proper divisors (596417654).

729666826 is a wasteful number, since it uses less digits than its factorization.

729666826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838.

The product of its digits is 2612736, while the sum is 52.

The square root of 729666826 is about 27012.3458070564. The cubic root of 729666826 is about 900.2743303642.

The spelling of 729666826 in words is "seven hundred twenty-nine million, six hundred sixty-six thousand, eight hundred twenty-six".