166420301 has 4 divisors (see below), whose sum is σ = 166897500. Its totient is φ = 165943104.

The previous prime is 166420273. The next prime is 166420313. The reversal of 166420301 is 103024661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124300201 + 42120100 = 11149^2 + 6490^2 .

It is a cyclic number.

It is not a de Polignac number, because 166420301 - 2¹⁰ = 166419277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166420201) 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, 238076 + ... + 238773.

It is an arithmetic number, because the mean of its divisors is an integer number (41724375).

Almost surely, 2^166420301 is an apocalyptic number.

It is an amenable number.

166420301 is a deficient number, since it is larger than the sum of its proper divisors (477199).

166420301 is an equidigital number, since it uses as much as digits as its factorization.

166420301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477198.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 166420301 is about 12900.3992573873. The cubic root of 166420301 is about 550.0499139273.

Adding to 166420301 its reverse (103024661), we get a palindrome (269444962).

The spelling of 166420301 in words is "one hundred sixty-six million, four hundred twenty thousand, three hundred one".