666160571 has 4 divisors (see below), whose sum is σ = 666544944. Its totient is φ = 665776200.

The previous prime is 666160567. The next prime is 666160597. The reversal of 666160571 is 175061666.

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

It is a cyclic number.

It is not a de Polignac number, because 666160571 - 2² = 666160567 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666160511) 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 3 ways as a sum of consecutive naturals, for example, 189575 + ... + 193056.

It is an arithmetic number, because the mean of its divisors is an integer number (166636236).

Almost surely, 2^666160571 is an apocalyptic number.

666160571 is a deficient number, since it is larger than the sum of its proper divisors (384373).

666160571 is a wasteful number, since it uses less digits than its factorization.

666160571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384372.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 666160571 is about 25810.0866135703. The cubic root of 666160571 is about 873.3593511307.

The spelling of 666160571 in words is "six hundred sixty-six million, one hundred sixty thousand, five hundred seventy-one".