166231001 has 8 divisors (see below), whose sum is σ = 169004160. Its totient is φ = 163471392.

The previous prime is 166230923. The next prime is 166231003. The reversal of 166231001 is 100132661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166231001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166231003) 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 7 ways as a sum of consecutive naturals, for example, 23036 + ... + 29378.

It is an arithmetic number, because the mean of its divisors is an integer number (21125520).

Almost surely, 2^166231001 is an apocalyptic number.

It is an amenable number.

166231001 is a deficient number, since it is larger than the sum of its proper divisors (2773159).

166231001 is an equidigital number, since it uses as much as digits as its factorization.

166231001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6775.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 166231001 is about 12893.0601875583. The cubic root of 166231001 is about 549.8412776153.

Adding to 166231001 its reverse (100132661), we get a palindrome (266363662).

The spelling of 166231001 in words is "one hundred sixty-six million, two hundred thirty-one thousand, one".