166759260243 has 4 divisors (see below), whose sum is σ = 222345680328. Its totient is φ = 111172840160.

The previous prime is 166759260223. The next prime is 166759260247. The reversal of 166759260243 is 342062957661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166759260243 - 2³⁰ = 165685518419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166759260247) 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, 27793210038 + ... + 27793210043.

It is an arithmetic number, because the mean of its divisors is an integer number (55586420082).

Almost surely, 2^166759260243 is an apocalyptic number.

166759260243 is a deficient number, since it is larger than the sum of its proper divisors (55586420085).

166759260243 is an equidigital number, since it uses as much as digits as its factorization.

166759260243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55586420084.

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 166759260243 in words is "one hundred sixty-six billion, seven hundred fifty-nine million, two hundred sixty thousand, two hundred forty-three".