166740733867 has 2 divisors, whose sum is σ = 166740733868. Its totient is φ = 166740733866.

The previous prime is 166740733853. The next prime is 166740733897. The reversal of 166740733867 is 768337047661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166740733867 is a prime.

It is not a weakly prime, because it can be changed into another prime (166740733897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83370366933 + 83370366934.

It is an arithmetic number, because the mean of its divisors is an integer number (83370366934).

Almost surely, 2^166740733867 is an apocalyptic number.

166740733867 is a deficient number, since it is larger than the sum of its proper divisors (1).

166740733867 is an equidigital number, since it uses as much as digits as its factorization.

166740733867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21337344, while the sum is 58.

The spelling of 166740733867 in words is "one hundred sixty-six billion, seven hundred forty million, seven hundred thirty-three thousand, eight hundred sixty-seven".