2001868667 has 4 divisors (see below), whose sum is σ = 2001991296. Its totient is φ = 2001746040.

The previous prime is 2001868639. The next prime is 2001868787. The reversal of 2001868667 is 7668681002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001868667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001868607) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 32228 + ... + 71009.

It is an arithmetic number, because the mean of its divisors is an integer number (500497824).

Almost surely, 2^2001868667 is an apocalyptic number.

2001868667 is a deficient number, since it is larger than the sum of its proper divisors (122629).

2001868667 is a wasteful number, since it uses less digits than its factorization.

2001868667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122628.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 2001868667 is about 44742.2470043694. The cubic root of 2001868667 is about 1260.3133232303.

The spelling of 2001868667 in words is "two billion, one million, eight hundred sixty-eight thousand, six hundred sixty-seven".