726666686 has 8 divisors (see below), whose sum is σ = 1090889184. Its totient is φ = 363036960.

The previous prime is 726666641. The next prime is 726666701. The reversal of 726666686 is 686666627.

726666686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145115 + ... + 150038.

It is an arithmetic number, because the mean of its divisors is an integer number (136361148).

Almost surely, 2^726666686 is an apocalyptic number.

726666686 is a deficient number, since it is larger than the sum of its proper divisors (364222498).

726666686 is a wasteful number, since it uses less digits than its factorization.

726666686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296386.

The product of its digits is 5225472, while the sum is 53.

The square root of 726666686 is about 26956.7558508067. The cubic root of 726666686 is about 899.0387622005.

The spelling of 726666686 in words is "seven hundred twenty-six million, six hundred sixty-six thousand, six hundred eighty-six".