2010721665705 has 8 divisors (see below), whose sum is σ = 3217154665152. Its totient is φ = 1072384888368.

The previous prime is 2010721665611. The next prime is 2010721665707. The reversal of 2010721665705 is 5075661270102.

It is a happy number.

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

It is not a de Polignac number, because 2010721665705 - 2¹⁵ = 2010721632937 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2010721665707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67024055509 + ... + 67024055538.

It is an arithmetic number, because the mean of its divisors is an integer number (402144333144).

Almost surely, 2^{2010721665705} is an apocalyptic number.

It is an amenable number.

2010721665705 is a deficient number, since it is larger than the sum of its proper divisors (1206432999447).

2010721665705 is a wasteful number, since it uses less digits than its factorization.

2010721665705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134048111055.

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 2010721665705 in words is "two trillion, ten billion, seven hundred twenty-one million, six hundred sixty-five thousand, seven hundred five".