166336251 has 8 divisors (see below), whose sum is σ = 222341904. Its totient is φ = 110610720.

The previous prime is 166336249. The next prime is 166336271. The reversal of 166336251 is 152633661.

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

It is not a de Polignac number, because 166336251 - 2¹ = 166336249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166336271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68640 + ... + 71021.

It is an arithmetic number, because the mean of its divisors is an integer number (27792738).

Almost surely, 2^166336251 is an apocalyptic number.

166336251 is a deficient number, since it is larger than the sum of its proper divisors (56005653).

166336251 is a wasteful number, since it uses less digits than its factorization.

166336251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140061.

The product of its digits is 19440, while the sum is 33.

The square root of 166336251 is about 12897.1411948540. The cubic root of 166336251 is about 549.9572980621.

The spelling of 166336251 in words is "one hundred sixty-six million, three hundred thirty-six thousand, two hundred fifty-one".