826660 has 12 divisors (see below), whose sum is σ = 1736028. Its totient is φ = 330656.

The previous prime is 826621. The next prime is 826663. The reversal of 826660 is 66628.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 580644 + 246016 = 762^2 + 496^2 .

It is not an unprimeable number, because it can be changed into a prime (826663) 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, 20647 + ... + 20686.

It is an arithmetic number, because the mean of its divisors is an integer number (144669).

2⁸²⁶⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

826660 is an abundant number, since it is smaller than the sum of its proper divisors (909368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

826660 is a wasteful number, since it uses less digits than its factorization.

826660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41342 (or 41340 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 826660 is about 909.2084469471. The cubic root of 826660 is about 93.8517354848.

Adding to 826660 its product of nonzero digits (3456), we get a triangular number (830116 = T₁₂₈₈).

The spelling of 826660 in words is "eight hundred twenty-six thousand, six hundred sixty".