665926 has 8 divisors (see below), whose sum is σ = 1026000. Its totient is φ = 323928.

The previous prime is 665923. The next prime is 665947. The reversal of 665926 is 629566.

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

It is a d-powerful number, because it can be written as 6² + 6² + 9⁶ + 5⁵ + 2¹⁷ + 6³ .

It is a junction number, because it is equal to n+sod(n) for n = 665891 and 665900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665921) 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, 4426 + ... + 4573.

It is an arithmetic number, because the mean of its divisors is an integer number (128250).

2⁶⁶⁵⁹²⁶ is an apocalyptic number.

665926 is a deficient number, since it is larger than the sum of its proper divisors (360074).

665926 is a wasteful number, since it uses less digits than its factorization.

665926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9038.

The product of its digits is 19440, while the sum is 34.

The square root of 665926 is about 816.0428910296. The cubic root of 665926 is about 87.3256828888.

The spelling of 665926 in words is "six hundred sixty-five thousand, nine hundred twenty-six".