166335241213 has 4 divisors (see below), whose sum is σ = 169062048508. Its totient is φ = 163608433920.

The previous prime is 166335241211. The next prime is 166335241231. The reversal of 166335241213 is 312142533661.

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 76382035129 + 89953206084 = 276373^2 + 299922^2 .

It is a cyclic number.

It is not a de Polignac number, because 166335241213 - 2¹ = 166335241211 is a prime.

It is a super-2 number, since 2×166335241213² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166335241211) 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, 1363403556 + ... + 1363403677.

It is an arithmetic number, because the mean of its divisors is an integer number (42265512127).

Almost surely, 2^166335241213 is an apocalyptic number.

It is an amenable number.

166335241213 is a deficient number, since it is larger than the sum of its proper divisors (2726807295).

166335241213 is an equidigital number, since it uses as much as digits as its factorization.

166335241213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2726807294.

The product of its digits is 77760, while the sum is 37.

Adding to 166335241213 its reverse (312142533661), we get a palindrome (478477774874).

The spelling of 166335241213 in words is "one hundred sixty-six billion, three hundred thirty-five million, two hundred forty-one thousand, two hundred thirteen".