166133643 has 8 divisors (see below), whose sum is σ = 238550928. Its totient is φ = 102236064.

The previous prime is 166133629. The next prime is 166133647. The reversal of 166133643 is 346331661.

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

It is not a de Polignac number, because 166133643 - 2²¹ = 164036491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166133647) 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 7 ways as a sum of consecutive naturals, for example, 2129880 + ... + 2129957.

It is an arithmetic number, because the mean of its divisors is an integer number (29818866).

Almost surely, 2^166133643 is an apocalyptic number.

166133643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

166133643 is a deficient number, since it is larger than the sum of its proper divisors (72417285).

166133643 is a wasteful number, since it uses less digits than its factorization.

166133643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4259853.

The product of its digits is 23328, while the sum is 33.

The square root of 166133643 is about 12889.2840375251. The cubic root of 166133643 is about 549.7339131628.

The spelling of 166133643 in words is "one hundred sixty-six million, one hundred thirty-three thousand, six hundred forty-three".