666002002 has 4 divisors (see below), whose sum is σ = 999003006. Its totient is φ = 333001000.

The previous prime is 666001997. The next prime is 666002011. The reversal of 666002002 is 200200666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 610633521 + 55368481 = 24711^2 + 7441^2 .

666002002 is a modest number, since divided by 2002 gives 666 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166500499 + ... + 166500502.

Almost surely, 2^666002002 is an apocalyptic number.

666002002 is a deficient number, since it is larger than the sum of its proper divisors (333001004).

666002002 is a wasteful number, since it uses less digits than its factorization.

666002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333001003.

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

The square root of 666002002 is about 25807.0145890609. The cubic root of 666002002 is about 873.2900491662.

Adding to 666002002 its reverse (200200666), we get a palindrome (866202668).

The spelling of 666002002 in words is "six hundred sixty-six million, two thousand, two".