166102745817 has 4 divisors (see below), whose sum is σ = 221470327760. Its totient is φ = 110735163876.

The previous prime is 166102745797. The next prime is 166102745827. The reversal of 166102745817 is 718547201661.

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, and also an emirpimes, since its reverse is a distinct semiprime: 718547201661 = 3 ⋅239515733887.

It is not a de Polignac number, because 166102745817 - 2¹⁰ = 166102744793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166102745827) 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, 27683790967 + ... + 27683790972.

It is an arithmetic number, because the mean of its divisors is an integer number (55367581940).

Almost surely, 2^166102745817 is an apocalyptic number.

It is an amenable number.

166102745817 is a deficient number, since it is larger than the sum of its proper divisors (55367581943).

166102745817 is an equidigital number, since it uses as much as digits as its factorization.

166102745817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55367581942.

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 166102745817 in words is "one hundred sixty-six billion, one hundred two million, seven hundred forty-five thousand, eight hundred seventeen".