668241257841 has 48 divisors (see below), whose sum is σ = 992912933376. Its totient is φ = 432867483648.

The previous prime is 668241257833. The next prime is 668241257843. The reversal of 668241257841 is 148752142866.

668241257841 is a `hidden beast` number, since 6 + 6 + 8 + 24 + 1 + 2 + 578 + 41 = 666.

It is not a de Polignac number, because 668241257841 - 2³ = 668241257833 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (668241257843) 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 47 ways as a sum of consecutive naturals, for example, 41056281 + ... + 41072553.

It is an arithmetic number, because the mean of its divisors is an integer number (20685686112).

Almost surely, 2^668241257841 is an apocalyptic number.

It is an amenable number.

668241257841 is a deficient number, since it is larger than the sum of its proper divisors (324671675535).

668241257841 is a wasteful number, since it uses less digits than its factorization.

668241257841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17022 (or 17019 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The spelling of 668241257841 in words is "six hundred sixty-eight billion, two hundred forty-one million, two hundred fifty-seven thousand, eight hundred forty-one".