166751016851 has 4 divisors (see below), whose sum is σ = 167040013992. Its totient is φ = 166462019712.

The previous prime is 166751016781. The next prime is 166751016869. The reversal of 166751016851 is 158610157661.

166751016851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166751016851 - 2¹⁴ = 166751000467 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166751016796 and 166751016805.

It is not an unprimeable number, because it can be changed into a prime (166751018851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144497705 + ... + 144498858.

It is an arithmetic number, because the mean of its divisors is an integer number (41760003498).

Almost surely, 2^166751016851 is an apocalyptic number.

166751016851 is a deficient number, since it is larger than the sum of its proper divisors (288997141).

166751016851 is an equidigital number, since it uses as much as digits as its factorization.

166751016851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288997140.

The product of its (nonzero) digits is 302400, while the sum is 47.

The spelling of 166751016851 in words is "one hundred sixty-six billion, seven hundred fifty-one million, sixteen thousand, eight hundred fifty-one".