726115666 has 32 divisors (see below), whose sum is σ = 1190891520. Its totient is φ = 330771600.

The previous prime is 726115657. The next prime is 726115703. The reversal of 726115666 is 666511627.

726115666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194881 + ... + 198571.

It is an arithmetic number, because the mean of its divisors is an integer number (37215360).

Almost surely, 2^726115666 is an apocalyptic number.

726115666 is a deficient number, since it is larger than the sum of its proper divisors (464775854).

726115666 is a wasteful number, since it uses less digits than its factorization.

726115666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910.

The product of its digits is 90720, while the sum is 40.

The square root of 726115666 is about 26946.5334690754. The cubic root of 726115666 is about 898.8114623870.

The spelling of 726115666 in words is "seven hundred twenty-six million, one hundred fifteen thousand, six hundred sixty-six".