166166754143 has 4 divisors (see below), whose sum is σ = 178948812168. Its totient is φ = 153384696120.

The previous prime is 166166754121. The next prime is 166166754163. The reversal of 166166754143 is 341457661661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341457661661 = 354023 ⋅964507.

It is a cyclic number.

It is not a de Polignac number, because 166166754143 - 2⁸ = 166166753887 is a prime.

It is a super-2 number, since 2×166166754143² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166166754091 and 166166754100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166166754163) 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, 6391028993 + ... + 6391029018.

It is an arithmetic number, because the mean of its divisors is an integer number (44737203042).

Almost surely, 2^166166754143 is an apocalyptic number.

166166754143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

166166754143 is a deficient number, since it is larger than the sum of its proper divisors (12782058025).

166166754143 is a wasteful number, since it uses less digits than its factorization.

166166754143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12782058024.

The product of its digits is 2177280, while the sum is 50.

The spelling of 166166754143 in words is "one hundred sixty-six billion, one hundred sixty-six million, seven hundred fifty-four thousand, one hundred forty-three".