166223143 has 8 divisors (see below), whose sum is σ = 170540496. Its totient is φ = 161918400.

The previous prime is 166223137. The next prime is 166223171. The reversal of 166223143 is 341322661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166223143 - 2⁹ = 166222631 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 (166223843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27288 + ... + 32818.

It is an arithmetic number, because the mean of its divisors is an integer number (21317562).

Almost surely, 2^166223143 is an apocalyptic number.

166223143 is a deficient number, since it is larger than the sum of its proper divisors (4317353).

166223143 is an equidigital number, since it uses as much as digits as its factorization.

166223143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6305.

The product of its digits is 5184, while the sum is 28.

The square root of 166223143 is about 12892.7554463738. The cubic root of 166223143 is about 549.8326135257.

The spelling of 166223143 in words is "one hundred sixty-six million, two hundred twenty-three thousand, one hundred forty-three".