667688666086 has 8 divisors (see below), whose sum is σ = 1078573999104. Its totient is φ = 308163999720.

The previous prime is 667688666083. The next prime is 667688666087. The reversal of 667688666086 is 680666886766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667688666081) 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, 12840166630 + ... + 12840166681.

It is an arithmetic number, because the mean of its divisors is an integer number (134821749888).

Almost surely, 2^667688666086 is an apocalyptic number.

667688666086 is a deficient number, since it is larger than the sum of its proper divisors (410885333018).

667688666086 is a wasteful number, since it uses less digits than its factorization.

667688666086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25680333326.

The product of its (nonzero) digits is 1003290624, while the sum is 73.

The spelling of 667688666086 in words is "six hundred sixty-seven billion, six hundred eighty-eight million, six hundred sixty-six thousand, eighty-six".