726664766 has 24 divisors (see below), whose sum is σ = 1157991480. Its totient is φ = 341037216.

The previous prime is 726664759. The next prime is 726664777. The reversal of 726664766 is 667466627.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2081960 + ... + 2082308.

It is an arithmetic number, because the mean of its divisors is an integer number (48249645).

Almost surely, 2^726664766 is an apocalyptic number.

726664766 is a deficient number, since it is larger than the sum of its proper divisors (431326714).

726664766 is a wasteful number, since it uses less digits than its factorization.

726664766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 527 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 50.

The square root of 726664766 is about 26956.7202381892. The cubic root of 726664766 is about 899.0379703859.

The spelling of 726664766 in words is "seven hundred twenty-six million, six hundred sixty-four thousand, seven hundred sixty-six".