666548954843 has 8 divisors (see below), whose sum is σ = 695773372416. Its totient is φ = 637344873000.

The previous prime is 666548954807. The next prime is 666548954881. The reversal of 666548954843 is 348459845666.

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 666548954843 - 2⁸ = 666548954587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666548954243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5016923 + ... + 5148068.

It is an arithmetic number, because the mean of its divisors is an integer number (86971671552).

Almost surely, 2^666548954843 is an apocalyptic number.

666548954843 is a deficient number, since it is larger than the sum of its proper divisors (29224417573).

666548954843 is a wasteful number, since it uses less digits than its factorization.

666548954843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10167865.

The product of its digits is 597196800, while the sum is 68.

The spelling of 666548954843 in words is "six hundred sixty-six billion, five hundred forty-eight million, nine hundred fifty-four thousand, eight hundred forty-three".