667670801768 has 16 divisors (see below), whose sum is σ = 1258437116160. Its totient is φ = 332087570800.

The previous prime is 667670801767. The next prime is 667670801797. The reversal of 667670801768 is 867108076766.

It is a self number, because there is not a number n which added to its sum of digits gives 667670801768.

It is not an unprimeable number, because it can be changed into a prime (667670801761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218477138 + ... + 218480193.

It is an arithmetic number, because the mean of its divisors is an integer number (78652319760).

Almost surely, 2^667670801768 is an apocalyptic number.

It is an amenable number.

667670801768 is a deficient number, since it is larger than the sum of its proper divisors (590766314392).

667670801768 is a wasteful number, since it uses less digits than its factorization.

667670801768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436957528 (or 436957524 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 62.

The spelling of 667670801768 in words is "six hundred sixty-seven billion, six hundred seventy million, eight hundred one thousand, seven hundred sixty-eight".