201668866868 has 48 divisors (see below), whose sum is σ = 404306281344. Its totient is φ = 86222223360.

The previous prime is 201668866843. The next prime is 201668866877. The reversal of 201668866868 is 868668866102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23077796 + ... + 23086532.

It is an arithmetic number, because the mean of its divisors is an integer number (8423047528).

Almost surely, 2^201668866868 is an apocalyptic number.

201668866868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

201668866868 is an abundant number, since it is smaller than the sum of its proper divisors (202637414476).

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

201668866868 is a wasteful number, since it uses less digits than its factorization.

201668866868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10632 (or 10630 counting only the distinct ones).

The product of its (nonzero) digits is 63700992, while the sum is 65.

The spelling of 201668866868 in words is "two hundred one billion, six hundred sixty-eight million, eight hundred sixty-six thousand, eight hundred sixty-eight".