725266666 has 8 divisors (see below), whose sum is σ = 1089694080. Its totient is φ = 362035308.

The previous prime is 725266643. The next prime is 725266667. The reversal of 725266666 is 666662527.

It is a happy number.

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

725266666 is a modest number, since divided by 66666 gives 7252 as remainder.

It is not an unprimeable number, because it can be changed into a prime (725266667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297496 + ... + 299923.

It is an arithmetic number, because the mean of its divisors is an integer number (136211760).

Almost surely, 2^725266666 is an apocalyptic number.

725266666 is a deficient number, since it is larger than the sum of its proper divisors (364427414).

725266666 is a wasteful number, since it uses less digits than its factorization.

725266666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598028.

The product of its digits is 1088640, while the sum is 46.

The square root of 725266666 is about 26930.7754437187. The cubic root of 725266666 is about 898.4610184327.

The spelling of 725266666 in words is "seven hundred twenty-five million, two hundred sixty-six thousand, six hundred sixty-six".