667538715006968 has 64 divisors (see below), whose sum is σ = 1515600824068800. Its totient is φ = 269078480732160.

The previous prime is 667538715006967. The next prime is 667538715007009. The reversal of 667538715006968 is 869600517835766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667538715006967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234041213 + ... + 236876268.

It is an arithmetic number, because the mean of its divisors is an integer number (23681262876075).

Almost surely, 2^{667538715006968} is an apocalyptic number.

667538715006968 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

667538715006968 is an abundant number, since it is smaller than the sum of its proper divisors (848062109061832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667538715006968 is a wasteful number, since it uses less digits than its factorization.

667538715006968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470919000 (or 470918996 counting only the distinct ones).

The product of its (nonzero) digits is 2743372800, while the sum is 77.

The spelling of 667538715006968 in words is "six hundred sixty-seven trillion, five hundred thirty-eight billion, seven hundred fifteen million, six thousand, nine hundred sixty-eight".