166051201 has 4 divisors (see below), whose sum is σ = 166164804. Its totient is φ = 165937600.

The previous prime is 166051183. The next prime is 166051213. The reversal of 166051201 is 102150661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102150661 = 61 ⋅1674601.

It can be written as a sum of positive squares in 2 ways, for example, as 32764176 + 133287025 = 5724^2 + 11545^2 .

It is a cyclic number.

It is not a de Polignac number, because 166051201 - 2⁷ = 166051073 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166051231) 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, 54580 + ... + 57541.

It is an arithmetic number, because the mean of its divisors is an integer number (41541201).

Almost surely, 2^166051201 is an apocalyptic number.

It is an amenable number.

166051201 is a deficient number, since it is larger than the sum of its proper divisors (113603).

166051201 is a wasteful number, since it uses less digits than its factorization.

166051201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113602.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 166051201 is about 12886.0855576859. The cubic root of 166051201 is about 549.6429649734.

The spelling of 166051201 in words is "one hundred sixty-six million, fifty-one thousand, two hundred one".