166254169 has 8 divisors (see below), whose sum is σ = 176368968. Its totient is φ = 156176640.

The previous prime is 166254131. The next prime is 166254191. The reversal of 166254169 is 961452661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 85470025 + 80784144 = 9245^2 + 8988^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 166254169 - 2⁷ = 166254041 is a prime.

It is a super-2 number, since 2×166254169² = 55280897419761122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166252169) 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, 159 + ... + 18235.

It is an arithmetic number, because the mean of its divisors is an integer number (22046121).

Almost surely, 2^166254169 is an apocalyptic number.

It is an amenable number.

166254169 is a deficient number, since it is larger than the sum of its proper divisors (10114799).

166254169 is a wasteful number, since it uses less digits than its factorization.

166254169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18635.

The product of its digits is 77760, while the sum is 40.

The square root of 166254169 is about 12893.9586240999. The cubic root of 166254169 is about 549.8668206465.

The spelling of 166254169 in words is "one hundred sixty-six million, two hundred fifty-four thousand, one hundred sixty-nine".