166211331645201 has 8 divisors (see below), whose sum is σ = 227604706397184. Its totient is φ = 107812755661680.

The previous prime is 166211331645103. The next prime is 166211331645209. The reversal of 166211331645201 is 102546133112661.

166211331645201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 166211331645201 - 2¹⁴ = 166211331628817 is a prime.

It is a super-2 number, since 2×166211331645201² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166211331645209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 748699691985 + ... + 748699692206.

It is an arithmetic number, because the mean of its divisors is an integer number (28450588299648).

Almost surely, 2^{166211331645201} is an apocalyptic number.

It is an amenable number.

166211331645201 is a deficient number, since it is larger than the sum of its proper divisors (61393374751983).

166211331645201 is a wasteful number, since it uses less digits than its factorization.

166211331645201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497399384231.

The product of its (nonzero) digits is 155520, while the sum is 42.

Adding to 166211331645201 its reverse (102546133112661), we get a palindrome (268757464757862).

The spelling of 166211331645201 in words is "one hundred sixty-six trillion, two hundred eleven billion, three hundred thirty-one million, six hundred forty-five thousand, two hundred one".