724685866 has 8 divisors (see below), whose sum is σ = 1087975044. Its totient is φ = 362027520.

The previous prime is 724685851. The next prime is 724685867. The reversal of 724685866 is 668586427.

724685866 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in 2 ways, for example, as 722480641 + 2205225 = 26879^2 + 1485^2 .

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

It is not an unprimeable number, because it can be changed into a prime (724685867) 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, 154825 + ... + 159436.

Almost surely, 2^724685866 is an apocalyptic number.

724685866 is a deficient number, since it is larger than the sum of its proper divisors (363289178).

724685866 is a wasteful number, since it uses less digits than its factorization.

724685866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315416.

The product of its digits is 3870720, while the sum is 52.

The square root of 724685866 is about 26919.9900817218. The cubic root of 724685866 is about 898.2211225249.

The spelling of 724685866 in words is "seven hundred twenty-four million, six hundred eighty-five thousand, eight hundred sixty-six".