726660337 has 8 divisors (see below), whose sum is σ = 809542440. Its totient is φ = 647633280.

The previous prime is 726660331. The next prime is 726660371. The reversal of 726660337 is 733066627.

It can be written as a sum of positive squares in 4 ways, for example, as 2027776 + 724632561 = 1424^2 + 26919^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 726660337 - 2³ = 726660329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 726660337.

It is not an unprimeable number, because it can be changed into a prime (726660331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 963364 + ... + 964117.

It is an arithmetic number, because the mean of its divisors is an integer number (101192805).

Almost surely, 2^726660337 is an apocalyptic number.

It is an amenable number.

726660337 is a deficient number, since it is larger than the sum of its proper divisors (82882103).

726660337 is a wasteful number, since it uses less digits than its factorization.

726660337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927523.

The product of its (nonzero) digits is 190512, while the sum is 40.

The square root of 726660337 is about 26956.6380878625. The cubic root of 726660337 is about 899.0361438457.

The spelling of 726660337 in words is "seven hundred twenty-six million, six hundred sixty thousand, three hundred thirty-seven".