166019704423 has 2 divisors, whose sum is σ = 166019704424. Its totient is φ = 166019704422.

The previous prime is 166019704387. The next prime is 166019704463. The reversal of 166019704423 is 324407910661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166019704423 - 2²¹ = 166017607271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166019704423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166019704463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83009852211 + 83009852212.

It is an arithmetic number, because the mean of its divisors is an integer number (83009852212).

Almost surely, 2^166019704423 is an apocalyptic number.

166019704423 is a deficient number, since it is larger than the sum of its proper divisors (1).

166019704423 is an equidigital number, since it uses as much as digits as its factorization.

166019704423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 166019704423 in words is "one hundred sixty-six billion, nineteen million, seven hundred four thousand, four hundred twenty-three".