726667 has 4 divisors (see below), whose sum is σ = 742176. Its totient is φ = 711160.

The previous prime is 726659. The next prime is 726679. The reversal of 726667 is 766627.

726667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 766627 = 151 ⋅5077.

It is a cyclic number.

It is not a de Polignac number, because 726667 - 2³ = 726659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726647) 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, 7684 + ... + 7777.

It is an arithmetic number, because the mean of its divisors is an integer number (185544).

2⁷²⁶⁶⁶⁷ is an apocalyptic number.

726667 is a deficient number, since it is larger than the sum of its proper divisors (15509).

726667 is a wasteful number, since it uses less digits than its factorization.

726667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15508.

The product of its digits is 21168, while the sum is 34.

The square root of 726667 is about 852.4476523517. The cubic root of 726667 is about 89.9038891695.

The spelling of 726667 in words is "seven hundred twenty-six thousand, six hundred sixty-seven".