666281241771 has 4 divisors (see below), whose sum is σ = 888374989032. Its totient is φ = 444187494512.

The previous prime is 666281241767. The next prime is 666281241797. The reversal of 666281241771 is 177142182666.

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 666281241771 - 2² = 666281241767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666281241701) 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, 111046873626 + ... + 111046873631.

It is an arithmetic number, because the mean of its divisors is an integer number (222093747258).

Almost surely, 2^666281241771 is an apocalyptic number.

666281241771 is a deficient number, since it is larger than the sum of its proper divisors (222093747261).

666281241771 is a wasteful number, since it uses less digits than its factorization.

666281241771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222093747260.

The product of its digits is 1354752, while the sum is 51.

The spelling of 666281241771 in words is "six hundred sixty-six billion, two hundred eighty-one million, two hundred forty-one thousand, seven hundred seventy-one".