1668339857025 has 96 divisors (see below), whose sum is σ = 3142938839040. Its totient is φ = 867143232000.

The previous prime is 1668339857021. The next prime is 1668339857077. The reversal of 1668339857025 is 5207589338661.

1668339857025 is a `hidden beast` number, since 1 + 6 + 6 + 8 + 3 + 39 + 8 + 570 + 25 = 666.

It is not a de Polignac number, because 1668339857025 - 2² = 1668339857021 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1668339857021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26010144 + ... + 26074206.

It is an arithmetic number, because the mean of its divisors is an integer number (32738946240).

Almost surely, 2^{1668339857025} is an apocalyptic number.

1668339857025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1668339857025 is a deficient number, since it is larger than the sum of its proper divisors (1474598982015).

1668339857025 is a wasteful number, since it uses less digits than its factorization.

1668339857025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65064 (or 65053 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 63.

The spelling of 1668339857025 in words is "one trillion, six hundred sixty-eight billion, three hundred thirty-nine million, eight hundred fifty-seven thousand, twenty-five".