166236143933 has 4 divisors (see below), whose sum is σ = 166428770688. Its totient is φ = 166043517180.

The previous prime is 166236143911. The next prime is 166236143987. The reversal of 166236143933 is 339341632661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166236143933 - 2⁸ = 166236143677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166236143903) 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, 96312083 + ... + 96313808.

It is an arithmetic number, because the mean of its divisors is an integer number (41607192672).

Almost surely, 2^166236143933 is an apocalyptic number.

It is an amenable number.

166236143933 is a deficient number, since it is larger than the sum of its proper divisors (192626755).

166236143933 is an equidigital number, since it uses as much as digits as its factorization.

166236143933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192626754.

The product of its digits is 1259712, while the sum is 47.

The spelling of 166236143933 in words is "one hundred sixty-six billion, two hundred thirty-six million, one hundred forty-three thousand, nine hundred thirty-three".