726663 has 8 divisors (see below), whose sum is σ = 1107328. Its totient is φ = 415224.

The previous prime is 726659. The next prime is 726679. The reversal of 726663 is 366627.

726663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 726663 - 2² = 726659 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 726663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17281 + ... + 17322.

It is an arithmetic number, because the mean of its divisors is an integer number (138416).

2⁷²⁶⁶⁶³ is an apocalyptic number.

726663 is a deficient number, since it is larger than the sum of its proper divisors (380665).

726663 is a wasteful number, since it uses less digits than its factorization.

726663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34613.

The product of its digits is 9072, while the sum is 30.

The square root of 726663 is about 852.4453061634. The cubic root of 726663 is about 89.9037242080.

The spelling of 726663 in words is "seven hundred twenty-six thousand, six hundred sixty-three".