166659280851 has 32 divisors (see below), whose sum is σ = 257813237248. Its totient is φ = 93788513280.

The previous prime is 166659280817. The next prime is 166659280867. The reversal of 166659280851 is 158082956661.

It is not a de Polignac number, because 166659280851 - 2¹¹ = 166659278803 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166659280791 and 166659280800.

It is not an unprimeable number, because it can be changed into a prime (166659280871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6488931 + ... + 6514563.

It is an arithmetic number, because the mean of its divisors is an integer number (8056663664).

Almost surely, 2^166659280851 is an apocalyptic number.

166659280851 is a deficient number, since it is larger than the sum of its proper divisors (91153956397).

166659280851 is a wasteful number, since it uses less digits than its factorization.

166659280851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30331.

The product of its (nonzero) digits is 6220800, while the sum is 57.

The spelling of 166659280851 in words is "one hundred sixty-six billion, six hundred fifty-nine million, two hundred eighty thousand, eight hundred fifty-one".