166251151 has 16 divisors (see below), whose sum is σ = 184559616. Its totient is φ = 148500000.

The previous prime is 166251139. The next prime is 166251157. The reversal of 166251151 is 151152661.

It is a happy number.

It is not a de Polignac number, because 166251151 - 2⁵ = 166251119 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 (166251157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167266 + ... + 168256.

It is an arithmetic number, because the mean of its divisors is an integer number (11534976).

Almost surely, 2^166251151 is an apocalyptic number.

166251151 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

166251151 is a deficient number, since it is larger than the sum of its proper divisors (18308465).

166251151 is a wasteful number, since it uses less digits than its factorization.

166251151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254.

The product of its digits is 1800, while the sum is 28.

The square root of 166251151 is about 12893.8415920159. The cubic root of 166251151 is about 549.8634933954.

The spelling of 166251151 in words is "one hundred sixty-six million, two hundred fifty-one thousand, one hundred fifty-one".