666106110601 has 4 divisors (see below), whose sum is σ = 674537833600. Its totient is φ = 657674387604.

The previous prime is 666106110587. The next prime is 666106110673. The reversal of 666106110601 is 106011601666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666106110601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666106110401) 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, 4215861381 + ... + 4215861538.

It is an arithmetic number, because the mean of its divisors is an integer number (168634458400).

Almost surely, 2^666106110601 is an apocalyptic number.

It is an amenable number.

666106110601 is a deficient number, since it is larger than the sum of its proper divisors (8431722999).

666106110601 is an equidigital number, since it uses as much as digits as its factorization.

666106110601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8431722998.

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 666106110601 in words is "six hundred sixty-six billion, one hundred six million, one hundred ten thousand, six hundred one".