166015253 has 6 divisors (see below), whose sum is σ = 168391542. Its totient is φ = 163672040.

The previous prime is 166015243. The next prime is 166015259. The reversal of 166015253 is 352510661.

It can be written as a sum of positive squares in only one way, i.e., 101646724 + 64368529 = 10082^2 + 8023^2 .

It is not a de Polignac number, because 166015253 - 2⁴ = 166015237 is a prime.

It is a super-2 number, since 2×166015253² = 55122128457308018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166015259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11426 + ... + 21507.

It is an arithmetic number, because the mean of its divisors is an integer number (28065257).

Almost surely, 2^166015253 is an apocalyptic number.

It is an amenable number.

166015253 is a deficient number, since it is larger than the sum of its proper divisors (2376289).

166015253 is an frugal number, since it uses more digits than its factorization.

166015253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33075 (or 33004 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 166015253 is about 12884.6906443267. The cubic root of 166015253 is about 549.6032985108.

The spelling of 166015253 in words is "one hundred sixty-six million, fifteen thousand, two hundred fifty-three".