166108115385840 has 40 divisors (see below), whose sum is σ = 514935157696848. Its totient is φ = 44295497436160.

The previous prime is 166108115385809. The next prime is 166108115385871. The reversal of 166108115385840 is 48583511801661.

It is an interprime number because it is at equal distance from previous prime (166108115385809) and next prime (166108115385871).

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 346058573481 + ... + 346058573960.

Almost surely, 2^{166108115385840} is an apocalyptic number.

166108115385840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166108115385840 is an abundant number, since it is smaller than the sum of its proper divisors (348827042311008).

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

166108115385840 is a wasteful number, since it uses less digits than its factorization.

166108115385840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692117147457 (or 692117147451 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 57.

The spelling of 166108115385840 in words is "one hundred sixty-six trillion, one hundred eight billion, one hundred fifteen million, three hundred eighty-five thousand, eight hundred forty".