666413143 has 4 divisors (see below), whose sum is σ = 726996168. Its totient is φ = 605830120.

The previous prime is 666413123. The next prime is 666413147. The reversal of 666413143 is 341314666.

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 666413143 - 2¹³ = 666404951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666413099 and 666413108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666413147) 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, 30291496 + ... + 30291517.

It is an arithmetic number, because the mean of its divisors is an integer number (181749042).

Almost surely, 2^666413143 is an apocalyptic number.

666413143 is a deficient number, since it is larger than the sum of its proper divisors (60583025).

666413143 is a wasteful number, since it uses less digits than its factorization.

666413143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60583024.

The product of its digits is 31104, while the sum is 34.

The square root of 666413143 is about 25814.9790431834. The cubic root of 666413143 is about 873.4697140349.

The spelling of 666413143 in words is "six hundred sixty-six million, four hundred thirteen thousand, one hundred forty-three".