166768810055870 has 128 divisors (see below), whose sum is σ = 329107738176000. Its totient is φ = 60341461608960.

The previous prime is 166768810055863. The next prime is 166768810055921. The reversal of 166768810055870 is 78550018867661.

It is a self number, because there is not a number n which added to its sum of digits gives 166768810055870.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44130405641 + ... + 44130409419.

It is an arithmetic number, because the mean of its divisors is an integer number (2571154204500).

Almost surely, 2^{166768810055870} is an apocalyptic number.

166768810055870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166768810055870 is a deficient number, since it is larger than the sum of its proper divisors (162338928120130).

166768810055870 is a wasteful number, since it uses less digits than its factorization.

166768810055870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6378.

The product of its (nonzero) digits is 135475200, while the sum is 68.

The spelling of 166768810055870 in words is "one hundred sixty-six trillion, seven hundred sixty-eight billion, eight hundred ten million, fifty-five thousand, eight hundred seventy".