666145143 has 24 divisors (see below), whose sum is σ = 1005854720. Its totient is φ = 424316880.

The previous prime is 666145133. The next prime is 666145157. The reversal of 666145143 is 341541666.

It is a happy number.

It is not a de Polignac number, because 666145143 - 2⁴ = 666145127 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666145098 and 666145107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666145133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6930 + ... + 37152.

Almost surely, 2^666145143 is an apocalyptic number.

666145143 is a deficient number, since it is larger than the sum of its proper divisors (339709577).

666145143 is a wasteful number, since it uses less digits than its factorization.

666145143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30339 (or 30336 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 666145143 is about 25809.7877364383. The cubic root of 666145143 is about 873.3526088663.

The spelling of 666145143 in words is "six hundred sixty-six million, one hundred forty-five thousand, one hundred forty-three".