166074238523 has 2 divisors, whose sum is σ = 166074238524. Its totient is φ = 166074238522.

The previous prime is 166074238493. The next prime is 166074238567. The reversal of 166074238523 is 325832470661.

It is a weak prime.

It is an emirp because it is prime and its reverse (325832470661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166074238523 - 2¹² = 166074234427 is a prime.

It is not a weakly prime, because it can be changed into another prime (166074238423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83037119261 + 83037119262.

It is an arithmetic number, because the mean of its divisors is an integer number (83037119262).

Almost surely, 2^166074238523 is an apocalyptic number.

166074238523 is a deficient number, since it is larger than the sum of its proper divisors (1).

166074238523 is an equidigital number, since it uses as much as digits as its factorization.

166074238523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 166074238523 in words is "one hundred sixty-six billion, seventy-four million, two hundred thirty-eight thousand, five hundred twenty-three".