666070611 has 4 divisors (see below), whose sum is σ = 888094152. Its totient is φ = 444047072.

The previous prime is 666070589. The next prime is 666070621. The reversal of 666070611 is 116070666.

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 666070611 - 2¹⁰ = 666069587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666070621) 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, 111011766 + ... + 111011771.

It is an arithmetic number, because the mean of its divisors is an integer number (222023538).

Almost surely, 2^666070611 is an apocalyptic number.

666070611 is a deficient number, since it is larger than the sum of its proper divisors (222023541).

666070611 is a wasteful number, since it uses less digits than its factorization.

666070611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222023540.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 666070611 is about 25808.3438252051. The cubic root of 666070611 is about 873.3200358127.

Subtracting from 666070611 its reverse (116070666), we obtain a palindrome (549999945).

The spelling of 666070611 in words is "six hundred sixty-six million, seventy thousand, six hundred eleven".