166303201 has 4 divisors (see below), whose sum is σ = 166384900. Its totient is φ = 166221504.

The previous prime is 166303183. The next prime is 166303211. The reversal of 166303201 is 102303661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102303661 = 503 ⋅203387.

It can be written as a sum of positive squares in 2 ways, for example, as 135489600 + 30813601 = 11640^2 + 5551^2 .

It is a cyclic number.

It is not a de Polignac number, because 166303201 - 2⁷ = 166303073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166303211) 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, 37716 + ... + 41893.

It is an arithmetic number, because the mean of its divisors is an integer number (41596225).

Almost surely, 2^166303201 is an apocalyptic number.

It is an amenable number.

166303201 is a deficient number, since it is larger than the sum of its proper divisors (81699).

166303201 is an equidigital number, since it uses as much as digits as its factorization.

166303201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81698.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 166303201 is about 12895.8598394989. The cubic root of 166303201 is about 549.9208712609.

Adding to 166303201 its reverse (102303661), we get a palindrome (268606862).

The spelling of 166303201 in words is "one hundred sixty-six million, three hundred three thousand, two hundred one".