670726 has 16 divisors (see below), whose sum is σ = 1200384. Its totient is φ = 274824.

The previous prime is 670711. The next prime is 670727. The reversal of 670726 is 627076.

670726 is nontrivially palindromic in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 670694 and 670703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670727) by changing a digit.

670726 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720 + ... + 1363.

It is an arithmetic number, because the mean of its divisors is an integer number (75024).

2⁶⁷⁰⁷²⁶ is an apocalyptic number.

670726 is a deficient number, since it is larger than the sum of its proper divisors (529658).

670726 is a wasteful number, since it uses less digits than its factorization.

670726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 670726 is about 818.9786321999. The cubic root of 670726 is about 87.5349955255.

The spelling of 670726 in words is "six hundred seventy thousand, seven hundred twenty-six".