166686763003378 has 16 divisors (see below), whose sum is σ = 250421108541120. Its totient is φ = 83213071830000.

The previous prime is 166686763003351. The next prime is 166686763003381. The reversal of 166686763003378 is 873300367686661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25760608 + ... + 31575028.

It is an arithmetic number, because the mean of its divisors is an integer number (15651319283820).

Almost surely, 2^{166686763003378} is an apocalyptic number.

166686763003378 is a deficient number, since it is larger than the sum of its proper divisors (83734345537742).

166686763003378 is a wasteful number, since it uses less digits than its factorization.

166686763003378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5836833.

The product of its (nonzero) digits is 658409472, while the sum is 70.

The spelling of 166686763003378 in words is "one hundred sixty-six trillion, six hundred eighty-six billion, seven hundred sixty-three million, three thousand, three hundred seventy-eight".