2001668685202 has 4 divisors (see below), whose sum is σ = 3002503027806. Its totient is φ = 1000834342600.

The previous prime is 2001668685179. The next prime is 2001668685217. The reversal of 2001668685202 is 2025868661002.

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., 2001090330801 + 578354401 = 1414599^2 + 24049^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500417171299 + ... + 500417171302.

Almost surely, 2^{2001668685202} is an apocalyptic number.

2001668685202 is a deficient number, since it is larger than the sum of its proper divisors (1000834342604).

2001668685202 is a wasteful number, since it uses less digits than its factorization.

2001668685202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000834342603.

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 2001668685202 in words is "two trillion, one billion, six hundred sixty-eight million, six hundred eighty-five thousand, two hundred two".