166641967705 has 16 divisors (see below), whose sum is σ = 205505392320. Its totient is φ = 129628130112.

The previous prime is 166641967607. The next prime is 166641967711. The reversal of 166641967705 is 507769146661.

It is not a de Polignac number, because 166641967705 - 2¹³ = 166641959513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166641967705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6882 + ... + 577348.

It is an arithmetic number, because the mean of its divisors is an integer number (12844087020).

Almost surely, 2^166641967705 is an apocalyptic number.

It is an amenable number.

166641967705 is a deficient number, since it is larger than the sum of its proper divisors (38863424615).

166641967705 is a wasteful number, since it uses less digits than its factorization.

166641967705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572088.

The product of its (nonzero) digits is 11430720, while the sum is 58.

The spelling of 166641967705 in words is "one hundred sixty-six billion, six hundred forty-one million, nine hundred sixty-seven thousand, seven hundred five".