1668501750925 has 24 divisors (see below), whose sum is σ = 2083500538056. Its totient is φ = 1325441821440.

The previous prime is 1668501750919. The next prime is 1668501751051. The reversal of 1668501750925 is 5290571058661.

It can be written as a sum of positive squares in 12 ways, for example, as 192028880521 + 1476472870404 = 438211^2 + 1215102^2 .

It is not a de Polignac number, because 1668501750925 - 2²⁹ = 1667964880013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1617867 + ... + 2440183.

It is an arithmetic number, because the mean of its divisors is an integer number (86812522419).

Almost surely, 2^{1668501750925} is an apocalyptic number.

It is an amenable number.

1668501750925 is a deficient number, since it is larger than the sum of its proper divisors (414998787131).

1668501750925 is a wasteful number, since it uses less digits than its factorization.

1668501750925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822897 (or 822892 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 55.

The spelling of 1668501750925 in words is "one trillion, six hundred sixty-eight billion, five hundred one million, seven hundred fifty thousand, nine hundred twenty-five".