726065666 has 16 divisors (see below), whose sum is σ = 1105362720. Its totient is φ = 357651840.

The previous prime is 726065651. The next prime is 726065687. The reversal of 726065666 is 666560627.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26450 + ... + 46386.

It is an arithmetic number, because the mean of its divisors is an integer number (69085170).

Almost surely, 2^726065666 is an apocalyptic number.

726065666 is a deficient number, since it is larger than the sum of its proper divisors (379297054).

726065666 is a wasteful number, since it uses less digits than its factorization.

726065666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20209.

The product of its (nonzero) digits is 544320, while the sum is 44.

The square root of 726065666 is about 26945.6056899822. The cubic root of 726065666 is about 898.7908313284.

The spelling of 726065666 in words is "seven hundred twenty-six million, sixty-five thousand, six hundred sixty-six".