667760726171 has 32 divisors (see below), whose sum is σ = 838355083776. Its totient is φ = 516706848000.

The previous prime is 667760726119. The next prime is 667760726177. The reversal of 667760726171 is 171627067766.

It is a de Polignac number, because none of the positive numbers 2^k-667760726171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667760726177) 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 31 ways as a sum of consecutive naturals, for example, 6286976 + ... + 6392306.

It is an arithmetic number, because the mean of its divisors is an integer number (26198596368).

Almost surely, 2^667760726171 is an apocalyptic number.

667760726171 is a deficient number, since it is larger than the sum of its proper divisors (170594357605).

667760726171 is a wasteful number, since it uses less digits than its factorization.

667760726171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105923.

The product of its (nonzero) digits is 6223392, while the sum is 56.

It can be divided in two parts, 667760 and 726171, that added together give a palindrome (1393931).

The spelling of 667760726171 in words is "six hundred sixty-seven billion, seven hundred sixty million, seven hundred twenty-six thousand, one hundred seventy-one".