166396241 has 4 divisors (see below), whose sum is σ = 181523184. Its totient is φ = 151269300.

The previous prime is 166396231. The next prime is 166396249. The reversal of 166396241 is 142693661.

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 a cyclic number.

It is not a de Polignac number, because 166396241 - 2⁶ = 166396177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166396195 and 166396204.

It is not an unprimeable number, because it can be changed into a prime (166396249) 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, 7563455 + ... + 7563476.

It is an arithmetic number, because the mean of its divisors is an integer number (45380796).

Almost surely, 2^166396241 is an apocalyptic number.

166396241 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166396241 is a deficient number, since it is larger than the sum of its proper divisors (15126943).

166396241 is a wasteful number, since it uses less digits than its factorization.

166396241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15126942.

The product of its digits is 46656, while the sum is 38.

The square root of 166396241 is about 12899.4666944025. The cubic root of 166396241 is about 550.0234050646.

The spelling of 166396241 in words is "one hundred sixty-six million, three hundred ninety-six thousand, two hundred forty-one".