666202 has 4 divisors (see below), whose sum is σ = 999306. Its totient is φ = 333100.

The previous prime is 666191. The next prime is 666203. The reversal of 666202 is 202666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 202666 = 2 ⋅101333.

It can be written as a sum of positive squares in only one way, i.e., 622521 + 43681 = 789^2 + 209^2 .

It is not an unprimeable number, because it can be changed into a prime (666203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166549 + ... + 166552.

2⁶⁶⁶²⁰² is an apocalyptic number.

666202 is a deficient number, since it is larger than the sum of its proper divisors (333104).

666202 is a wasteful number, since it uses less digits than its factorization.

666202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333103.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 666202 is about 816.2119822693. The cubic root of 666202 is about 87.3377455702.

Adding to 666202 its reverse (202666), we get a palindrome (868868).

It can be divided in two parts, 666 and 202, that added together give a palindrome (868).

The spelling of 666202 in words is "six hundred sixty-six thousand, two hundred two".