166678597506 has 16 divisors (see below), whose sum is σ = 333451432800. Its totient is φ = 55543826208.

The previous prime is 166678597469. The next prime is 166678597517. The reversal of 166678597506 is 605795876661.

166678597506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 3903571 + ... + 3946038.

It is an arithmetic number, because the mean of its divisors is an integer number (20840714550).

Almost surely, 2^166678597506 is an apocalyptic number.

166678597506 is an abundant number, since it is smaller than the sum of its proper divisors (166772835294).

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

166678597506 is a wasteful number, since it uses less digits than its factorization.

166678597506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7853153.

The product of its (nonzero) digits is 114307200, while the sum is 66.

The spelling of 166678597506 in words is "one hundred sixty-six billion, six hundred seventy-eight million, five hundred ninety-seven thousand, five hundred six".