665070571201 has 4 divisors (see below), whose sum is σ = 665552158804. Its totient is φ = 664588983600.

The previous prime is 665070571169. The next prime is 665070571213. The reversal of 665070571201 is 102175070566.

It is a happy number.

665070571201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 337039463601 + 328031107600 = 580551^2 + 572740^2 .

It is a cyclic number.

It is not a de Polignac number, because 665070571201 - 2⁵ = 665070571169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665070575201) 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, 240791730 + ... + 240794491.

It is an arithmetic number, because the mean of its divisors is an integer number (166388039701).

Almost surely, 2^665070571201 is an apocalyptic number.

It is an amenable number.

665070571201 is a deficient number, since it is larger than the sum of its proper divisors (481587603).

665070571201 is a wasteful number, since it uses less digits than its factorization.

665070571201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481587602.

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 665070571201 in words is "six hundred sixty-five billion, seventy million, five hundred seventy-one thousand, two hundred one".