2668742899201 has 4 divisors (see below), whose sum is σ = 2668873810900. Its totient is φ = 2668611987504.

The previous prime is 2668742899111. The next prime is 2668742899223. The reversal of 2668742899201 is 1029982478662.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1288531468225 + 1380211430976 = 1135135^2 + 1174824^2 .

It is a cyclic number.

It is not a de Polignac number, because 2668742899201 - 2⁷ = 2668742899073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2668742899231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65425266 + ... + 65466043.

It is an arithmetic number, because the mean of its divisors is an integer number (667218452725).

Almost surely, 2^{2668742899201} is an apocalyptic number.

It is an amenable number.

2668742899201 is a deficient number, since it is larger than the sum of its proper divisors (130911699).

2668742899201 is a wasteful number, since it uses less digits than its factorization.

2668742899201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130911698.

The product of its (nonzero) digits is 41803776, while the sum is 64.

The spelling of 2668742899201 in words is "two trillion, six hundred sixty-eight billion, seven hundred forty-two million, eight hundred ninety-nine thousand, two hundred one".