166440269614291 has 2 divisors, whose sum is σ = 166440269614292. Its totient is φ = 166440269614290.

The previous prime is 166440269614271. The next prime is 166440269614319. The reversal of 166440269614291 is 192416962044661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166440269614291 - 2⁷ = 166440269614163 is a prime.

It is a super-2 number, since 2×166440269614291² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166440269614271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83220134807145 + 83220134807146.

It is an arithmetic number, because the mean of its divisors is an integer number (83220134807146).

Almost surely, 2^{166440269614291} is an apocalyptic number.

166440269614291 is a deficient number, since it is larger than the sum of its proper divisors (1).

166440269614291 is an equidigital number, since it uses as much as digits as its factorization.

166440269614291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26873856, while the sum is 61.

The spelling of 166440269614291 in words is "one hundred sixty-six trillion, four hundred forty billion, two hundred sixty-nine million, six hundred fourteen thousand, two hundred ninety-one".