491176666697 has 16 divisors (see below), whose sum is σ = 509831773440. Its totient is φ = 472859275392.

The previous prime is 491176666663. The next prime is 491176666733. The reversal of 491176666697 is 796666671194.

It is a cyclic number.

It is not a de Polignac number, because 491176666697 - 2¹⁰ = 491176665673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491176666637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4615079 + ... + 4720307.

It is an arithmetic number, because the mean of its divisors is an integer number (31864485840).

Almost surely, 2^491176666697 is an apocalyptic number.

It is an amenable number.

491176666697 is a deficient number, since it is larger than the sum of its proper divisors (18655106743).

491176666697 is a wasteful number, since it uses less digits than its factorization.

491176666697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106832.

The product of its digits is 123451776, while the sum is 68.

The spelling of 491176666697 in words is "four hundred ninety-one billion, one hundred seventy-six million, six hundred sixty-six thousand, six hundred ninety-seven".