668288018497 has 8 divisors (see below), whose sum is σ = 736557367392. Its totient is φ = 601271318400.

The previous prime is 668288018473. The next prime is 668288018501. The reversal of 668288018497 is 794810882866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 668288018497 - 2³¹ = 666140534849 is a prime.

It is a super-2 number, since 2×668288018497² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (668288018407) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 313161079 + ... + 313163212.

It is an arithmetic number, because the mean of its divisors is an integer number (92069670924).

Almost surely, 2^668288018497 is an apocalyptic number.

It is an amenable number.

668288018497 is a deficient number, since it is larger than the sum of its proper divisors (68269348895).

668288018497 is a wasteful number, since it uses less digits than its factorization.

668288018497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626324399.

The product of its (nonzero) digits is 74317824, while the sum is 67.

The spelling of 668288018497 in words is "six hundred sixty-eight billion, two hundred eighty-eight million, eighteen thousand, four hundred ninety-seven".