166133671 has 4 divisors (see below), whose sum is σ = 181236744. Its totient is φ = 151030600.

The previous prime is 166133651. The next prime is 166133687. The reversal of 166133671 is 176331661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176331661 = 11 ⋅16030151.

It is a cyclic number.

It is not a de Polignac number, because 166133671 - 2⁹ = 166133159 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 (166133651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7551520 + ... + 7551541.

It is an arithmetic number, because the mean of its divisors is an integer number (45309186).

Almost surely, 2^166133671 is an apocalyptic number.

166133671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

166133671 is a deficient number, since it is larger than the sum of its proper divisors (15103073).

166133671 is a wasteful number, since it uses less digits than its factorization.

166133671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15103072.

The product of its digits is 13608, while the sum is 34.

The square root of 166133671 is about 12889.2851236987. The cubic root of 166133671 is about 549.7339440466.

The spelling of 166133671 in words is "one hundred sixty-six million, one hundred thirty-three thousand, six hundred seventy-one".