168665880390 has 32 divisors (see below), whose sum is σ = 462626415360. Its totient is φ = 38552201184.

The previous prime is 168665880379. The next prime is 168665880463. The reversal of 168665880390 is 93088566861.

It is a congruent number.

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, 401585220 + ... + 401585639.

It is an arithmetic number, because the mean of its divisors is an integer number (14457075480).

Almost surely, 2^168665880390 is an apocalyptic number.

168665880390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168665880390 is an abundant number, since it is smaller than the sum of its proper divisors (293960534970).

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

168665880390 is a wasteful number, since it uses less digits than its factorization.

168665880390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803170876.

The product of its (nonzero) digits is 14929920, while the sum is 60.

The spelling of 168665880390 in words is "one hundred sixty-eight billion, six hundred sixty-five million, eight hundred eighty thousand, three hundred ninety".