166233724253 has 2 divisors, whose sum is σ = 166233724254. Its totient is φ = 166233724252.

The previous prime is 166233724249. The next prime is 166233724291. The reversal of 166233724253 is 352427332661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145235685604 + 20998038649 = 381098^2 + 144907^2 .

It is a cyclic number.

It is not a de Polignac number, because 166233724253 - 2² = 166233724249 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166233724213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83116862126 + 83116862127.

It is an arithmetic number, because the mean of its divisors is an integer number (83116862127).

Almost surely, 2^166233724253 is an apocalyptic number.

It is an amenable number.

166233724253 is a deficient number, since it is larger than the sum of its proper divisors (1).

166233724253 is an equidigital number, since it uses as much as digits as its factorization.

166233724253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 44.

The spelling of 166233724253 in words is "one hundred sixty-six billion, two hundred thirty-three million, seven hundred twenty-four thousand, two hundred fifty-three".