166123227001 has 4 divisors (see below), whose sum is σ = 166124052900. Its totient is φ = 166122401104.

The previous prime is 166123226999. The next prime is 166123227007. The reversal of 166123227001 is 100722321661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 84418721401 + 81704505600 = 290549^2 + 285840^2 .

It is a cyclic number.

It is not a de Polignac number, because 166123227001 - 2¹ = 166123226999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166123227007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106935 + ... + 586243.

It is an arithmetic number, because the mean of its divisors is an integer number (41531013225).

Almost surely, 2^166123227001 is an apocalyptic number.

It is an amenable number.

166123227001 is a deficient number, since it is larger than the sum of its proper divisors (825899).

166123227001 is an equidigital number, since it uses as much as digits as its factorization.

166123227001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825898.

The product of its (nonzero) digits is 6048, while the sum is 31.

Adding to 166123227001 its reverse (100722321661), we get a palindrome (266845548662).

The spelling of 166123227001 in words is "one hundred sixty-six billion, one hundred twenty-three million, two hundred twenty-seven thousand, one".