667707115668 has 96 divisors (see below), whose sum is σ = 1661573222400. Its totient is φ = 208092945024.

The previous prime is 667707115667. The next prime is 667707115681. The reversal of 667707115668 is 866511707766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667707115667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6832293 + ... + 6929331.

It is an arithmetic number, because the mean of its divisors is an integer number (17308054400).

Almost surely, 2^667707115668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667707115668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (830786611200).

667707115668 is an abundant number, since it is smaller than the sum of its proper divisors (993866106732).

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

667707115668 is a wasteful number, since it uses less digits than its factorization.

667707115668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97461 (or 97459 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 60.

The spelling of 667707115668 in words is "six hundred sixty-seven billion, seven hundred seven million, one hundred fifteen thousand, six hundred sixty-eight".