166235452013 has 2 divisors, whose sum is σ = 166235452014. Its totient is φ = 166235452012.

The previous prime is 166235451997. The next prime is 166235452021. The reversal of 166235452013 is 310254532661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102770254084 + 63465197929 = 320578^2 + 251923^2 .

It is a cyclic number.

It is not a de Polignac number, because 166235452013 - 2⁴ = 166235451997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166235452093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83117726006 + 83117726007.

It is an arithmetic number, because the mean of its divisors is an integer number (83117726007).

Almost surely, 2^166235452013 is an apocalyptic number.

It is an amenable number.

166235452013 is a deficient number, since it is larger than the sum of its proper divisors (1).

166235452013 is an equidigital number, since it uses as much as digits as its factorization.

166235452013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 166235452013 its reverse (310254532661), we get a palindrome (476489984674).

The spelling of 166235452013 in words is "one hundred sixty-six billion, two hundred thirty-five million, four hundred fifty-two thousand, thirteen".