2001066653 has 8 divisors (see below), whose sum is σ = 2013582648. Its totient is φ = 1988573184.

The previous prime is 2001066649. The next prime is 2001066667. The reversal of 2001066653 is 3566601002.

It can be written as a sum of positive squares in 4 ways, for example, as 414000409 + 1587066244 = 20347^2 + 39838^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2001066653 - 2² = 2001066649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001066553) 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 7 ways as a sum of consecutive naturals, for example, 194351 + ... + 204387.

It is an arithmetic number, because the mean of its divisors is an integer number (251697831).

Almost surely, 2^2001066653 is an apocalyptic number.

It is an amenable number.

2001066653 is a deficient number, since it is larger than the sum of its proper divisors (12515995).

2001066653 is a wasteful number, since it uses less digits than its factorization.

2001066653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11263.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 2001066653 is about 44733.2835034496. The cubic root of 2001066653 is about 1260.1449931826.

Adding to 2001066653 its reverse (3566601002), we get a palindrome (5567667655).

The spelling of 2001066653 in words is "two billion, one million, sixty-six thousand, six hundred fifty-three".