166276388879 has 4 divisors (see below), whose sum is σ = 166559654184. Its totient is φ = 165993123576.

The previous prime is 166276388827. The next prime is 166276388903. The reversal of 166276388879 is 978883672661.

166276388879 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, and also an emirpimes, since its reverse is a distinct semiprime: 978883672661 = 647 ⋅1512957763.

It is a cyclic number.

It is not a de Polignac number, because 166276388879 - 2¹² = 166276384783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166276388279) 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, 141631772 + ... + 141632945.

It is an arithmetic number, because the mean of its divisors is an integer number (41639913546).

Almost surely, 2^166276388879 is an apocalyptic number.

166276388879 is a deficient number, since it is larger than the sum of its proper divisors (283265305).

166276388879 is an equidigital number, since it uses as much as digits as its factorization.

166276388879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283265304.

The product of its digits is 292626432, while the sum is 71.

The spelling of 166276388879 in words is "one hundred sixty-six billion, two hundred seventy-six million, three hundred eighty-eight thousand, eight hundred seventy-nine".