166814081277 has 8 divisors (see below), whose sum is σ = 227591304864. Its totient is φ = 108623122608.

The previous prime is 166814081263. The next prime is 166814081297. The reversal of 166814081277 is 772180418661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166814081277 - 2⁷ = 166814081149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166814081227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646566078 + ... + 646566335.

It is an arithmetic number, because the mean of its divisors is an integer number (28448913108).

Almost surely, 2^166814081277 is an apocalyptic number.

It is an amenable number.

166814081277 is a deficient number, since it is larger than the sum of its proper divisors (60777223587).

166814081277 is a wasteful number, since it uses less digits than its factorization.

166814081277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293132459.

The product of its (nonzero) digits is 903168, while the sum is 51.

The spelling of 166814081277 in words is "one hundred sixty-six billion, eight hundred fourteen million, eighty-one thousand, two hundred seventy-seven".