724145668 has 12 divisors (see below), whose sum is σ = 1341799452. Its totient is φ = 340774400.

The previous prime is 724145657. The next prime is 724145713. The reversal of 724145668 is 866541427.

It can be written as a sum of positive squares in 2 ways, for example, as 614147524 + 109998144 = 24782^2 + 10488^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5324533 + ... + 5324668.

It is an arithmetic number, because the mean of its divisors is an integer number (111816621).

Almost surely, 2^724145668 is an apocalyptic number.

It is an amenable number.

724145668 is a deficient number, since it is larger than the sum of its proper divisors (617653784).

724145668 is a wasteful number, since it uses less digits than its factorization.

724145668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10649222 (or 10649220 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 724145668 is about 26909.9548122995. The cubic root of 724145668 is about 897.9978819500.

The spelling of 724145668 in words is "seven hundred twenty-four million, one hundred forty-five thousand, six hundred sixty-eight".