665101066057 has 4 divisors (see below), whose sum is σ = 704224658196. Its totient is φ = 625977473920.

The previous prime is 665101065983. The next prime is 665101066103. The reversal of 665101066057 is 750660101566.

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 567575397376 + 97525668681 = 753376^2 + 312291^2 .

It is a cyclic number.

It is not a de Polignac number, because 665101066057 - 2²³ = 665092677449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665101063057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19561796044 + ... + 19561796077.

It is an arithmetic number, because the mean of its divisors is an integer number (176056164549).

Almost surely, 2^665101066057 is an apocalyptic number.

It is an amenable number.

665101066057 is a deficient number, since it is larger than the sum of its proper divisors (39123592139).

665101066057 is a wasteful number, since it uses less digits than its factorization.

665101066057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39123592138.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 665101066057 in words is "six hundred sixty-five billion, one hundred one million, sixty-six thousand, fifty-seven".