726248666 has 32 divisors (see below), whose sum is σ = 1347192000. Its totient is φ = 288679680.

The previous prime is 726248657. The next prime is 726248669. The reversal of 726248666 is 666842627.

It is a self number, because there is not a number n which added to its sum of digits gives 726248666.

It is not an unprimeable number, because it can be changed into a prime (726248669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61391 + ... + 72258.

It is an arithmetic number, because the mean of its divisors is an integer number (42099750).

Almost surely, 2^726248666 is an apocalyptic number.

726248666 is a deficient number, since it is larger than the sum of its proper divisors (620943334).

726248666 is a wasteful number, since it uses less digits than its factorization.

726248666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133694.

The product of its digits is 1161216, while the sum is 47.

The square root of 726248666 is about 26949.0012059816. The cubic root of 726248666 is about 898.8663363932.

The spelling of 726248666 in words is "seven hundred twenty-six million, two hundred forty-eight thousand, six hundred sixty-six".