166369201 has 4 divisors (see below), whose sum is σ = 172106100. Its totient is φ = 160632304.

The previous prime is 166369199. The next prime is 166369243. The reversal of 166369201 is 102963661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102963661 = 541 ⋅190321.

It can be written as a sum of positive squares in 2 ways, for example, as 117158976 + 49210225 = 10824^2 + 7015^2 .

It is a cyclic number.

It is not a de Polignac number, because 166369201 - 2¹ = 166369199 is a prime.

It is a super-4 number, since 4×166369201⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166369261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2868406 + ... + 2868463.

It is an arithmetic number, because the mean of its divisors is an integer number (43026525).

Almost surely, 2^166369201 is an apocalyptic number.

It is an amenable number.

166369201 is a deficient number, since it is larger than the sum of its proper divisors (5736899).

166369201 is an equidigital number, since it uses as much as digits as its factorization.

166369201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5736898.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 166369201 is about 12898.4185464731. The cubic root of 166369201 is about 549.9936098431.

The spelling of 166369201 in words is "one hundred sixty-six million, three hundred sixty-nine thousand, two hundred one".