1668717053850 has 96 divisors (see below), whose sum is σ = 5159586479616. Its totient is φ = 346746398400.

The previous prime is 1668717053819. The next prime is 1668717053881. The reversal of 1668717053850 is 583507178661.

It is an interprime number because it is at equal distance from previous prime (1668717053819) and next prime (1668717053881).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72227284 + ... + 72250383.

It is an arithmetic number, because the mean of its divisors is an integer number (53745692496).

Almost surely, 2^{1668717053850} is an apocalyptic number.

1668717053850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1668717053850 is an abundant number, since it is smaller than the sum of its proper divisors (3490869425766).

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

1668717053850 is a wasteful number, since it uses less digits than its factorization.

1668717053850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144477700 (or 144477695 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 57.

The spelling of 1668717053850 in words is "one trillion, six hundred sixty-eight billion, seven hundred seventeen million, fifty-three thousand, eight hundred fifty".