667406104217543 has 8 divisors (see below), whose sum is σ = 681606640912320. Its totient is φ = 653205584473600.

The previous prime is 667406104217537. The next prime is 667406104217549. The reversal of 667406104217543 is 345712401604766.

667406104217543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (667406104217537) and next prime (667406104217549).

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 667406104217543 - 2⁸ = 667406104217287 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 (667406104217549) 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, 104972843 + ... + 111149043.

It is an arithmetic number, because the mean of its divisors is an integer number (85200830114040).

Almost surely, 2^{667406104217543} is an apocalyptic number.

667406104217543 is a deficient number, since it is larger than the sum of its proper divisors (14200536694777).

667406104217543 is a wasteful number, since it uses less digits than its factorization.

667406104217543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8475417.

The product of its (nonzero) digits is 20321280, while the sum is 56.

The spelling of 667406104217543 in words is "six hundred sixty-seven trillion, four hundred six billion, one hundred four million, two hundred seventeen thousand, five hundred forty-three".