666952 has 48 divisors (see below), whose sum is σ = 1508220. Its totient is φ = 274560.

The previous prime is 666937. The next prime is 666959. The reversal of 666952 is 259666.

It can be written as a sum of positive squares in 2 ways, for example, as 662596 + 4356 = 814^2 + 66^2 .

It is not an unprimeable number, because it can be changed into a prime (666959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12558 + ... + 12610.

2⁶⁶⁶⁹⁵² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (754110).

666952 is an abundant number, since it is smaller than the sum of its proper divisors (841268).

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

666952 is a wasteful number, since it uses less digits than its factorization.

666952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 79 counting only the distinct ones).

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

The square root of 666952 is about 816.6712925039. The cubic root of 666952 is about 87.3705077773.

The spelling of 666952 in words is "six hundred sixty-six thousand, nine hundred fifty-two".