668547126345 has 48 divisors (see below), whose sum is σ = 1244863496448. Its totient is φ = 305487141120.

The previous prime is 668547126281. The next prime is 668547126389. The reversal of 668547126345 is 543621745866.

It is not a de Polignac number, because 668547126345 - 2⁶ = 668547126281 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1482085 + ... + 1879805.

It is an arithmetic number, because the mean of its divisors is an integer number (25934656176).

Almost surely, 2^668547126345 is an apocalyptic number.

It is an amenable number.

668547126345 is a deficient number, since it is larger than the sum of its proper divisors (576316370103).

668547126345 is a wasteful number, since it uses less digits than its factorization.

668547126345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400030 (or 400023 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 57.

The spelling of 668547126345 in words is "six hundred sixty-eight billion, five hundred forty-seven million, one hundred twenty-six thousand, three hundred forty-five".