666132206 has 4 divisors (see below), whose sum is σ = 999198312. Its totient is φ = 333066102.

The previous prime is 666132169. The next prime is 666132239. The reversal of 666132206 is 602231666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 602231666 = 2 ⋅301115833.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166533050 + ... + 166533053.

It is an arithmetic number, because the mean of its divisors is an integer number (249799578).

Almost surely, 2^666132206 is an apocalyptic number.

666132206 is a deficient number, since it is larger than the sum of its proper divisors (333066106).

666132206 is a wasteful number, since it uses less digits than its factorization.

666132206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333066105.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 666132206 is about 25809.5371132456. The cubic root of 666132206 is about 873.3469551255.

The spelling of 666132206 in words is "six hundred sixty-six million, one hundred thirty-two thousand, two hundred six".