165672201 has 4 divisors (see below), whose sum is σ = 220896272. Its totient is φ = 110448132.

The previous prime is 165672187. The next prime is 165672203. The reversal of 165672201 is 102276561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 165672201 - 2⁶ = 165672137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165672203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27612031 + ... + 27612036.

It is an arithmetic number, because the mean of its divisors is an integer number (55224068).

Almost surely, 2^165672201 is an apocalyptic number.

It is an amenable number.

165672201 is a deficient number, since it is larger than the sum of its proper divisors (55224071).

165672201 is an equidigital number, since it uses as much as digits as its factorization.

165672201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55224070.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 165672201 is about 12871.3713721577. The cubic root of 165672201 is about 549.2244728226.

The spelling of 165672201 in words is "one hundred sixty-five million, six hundred seventy-two thousand, two hundred one".