166279591223 has 2 divisors, whose sum is σ = 166279591224. Its totient is φ = 166279591222.

The previous prime is 166279591199. The next prime is 166279591237. The reversal of 166279591223 is 322195972661.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (322195972661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166279591223 - 2¹⁰ = 166279590199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166279591823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83139795611 + 83139795612.

It is an arithmetic number, because the mean of its divisors is an integer number (83139795612).

Almost surely, 2^166279591223 is an apocalyptic number.

166279591223 is a deficient number, since it is larger than the sum of its proper divisors (1).

166279591223 is an equidigital number, since it uses as much as digits as its factorization.

166279591223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 53.

The spelling of 166279591223 in words is "one hundred sixty-six billion, two hundred seventy-nine million, five hundred ninety-one thousand, two hundred twenty-three".