667788068136 has 64 divisors (see below), whose sum is σ = 1990920960000. Its totient is φ = 182501085888.

The previous prime is 667788068111. The next prime is 667788068141. The reversal of 667788068136 is 631860887766.

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86407636 + ... + 86415363.

It is an arithmetic number, because the mean of its divisors is an integer number (31108140000).

Almost surely, 2^667788068136 is an apocalyptic number.

It is an amenable number.

667788068136 is an abundant number, since it is smaller than the sum of its proper divisors (1323132891864).

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

667788068136 is a wasteful number, since it uses less digits than its factorization.

667788068136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172823038 (or 172823034 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 66.

The spelling of 667788068136 in words is "six hundred sixty-seven billion, seven hundred eighty-eight million, sixty-eight thousand, one hundred thirty-six".