666364543 has 8 divisors (see below), whose sum is σ = 732892608. Its totient is φ = 602017824.

The previous prime is 666364529. The next prime is 666364571. The reversal of 666364543 is 345463666.

It is a happy number.

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 666364543 - 2⁹ = 666364031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666364543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666364583) 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, 544696 + ... + 545917.

It is an arithmetic number, because the mean of its divisors is an integer number (91611576).

Almost surely, 2^666364543 is an apocalyptic number.

666364543 is a deficient number, since it is larger than the sum of its proper divisors (66528065).

666364543 is a wasteful number, since it uses less digits than its factorization.

666364543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090673.

The product of its digits is 933120, while the sum is 43.

The square root of 666364543 is about 25814.0377120667. The cubic root of 666364543 is about 873.4484801299.

The spelling of 666364543 in words is "six hundred sixty-six million, three hundred sixty-four thousand, five hundred forty-three".