166151065 has 8 divisors (see below), whose sum is σ = 204244488. Its totient is φ = 129678720.

The previous prime is 166151023. The next prime is 166151087. The reversal of 166151065 is 560151661.

It can be written as a sum of positive squares in 4 ways, for example, as 1490841 + 164660224 = 1221^2 + 12832^2 .

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

It is not a de Polignac number, because 166151065 - 2¹⁹ = 165626777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405042 + ... + 405451.

It is an arithmetic number, because the mean of its divisors is an integer number (25530561).

Almost surely, 2^166151065 is an apocalyptic number.

It is an amenable number.

166151065 is a deficient number, since it is larger than the sum of its proper divisors (38093423).

166151065 is an equidigital number, since it uses as much as digits as its factorization.

166151065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810539.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 166151065 is about 12889.9598525364. The cubic root of 166151065 is about 549.7531288763.

The spelling of 166151065 in words is "one hundred sixty-six million, one hundred fifty-one thousand, sixty-five".