668569710149 has 32 divisors (see below), whose sum is σ = 749457536256. Its totient is φ = 591240133120.

The previous prime is 668569710113. The next prime is 668569710157. The reversal of 668569710149 is 941017965866.

It is a cyclic number.

It is not a de Polignac number, because 668569710149 - 2⁸ = 668569709893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 668569710091 and 668569710100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668569710169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70840859 + ... + 70850295.

It is an arithmetic number, because the mean of its divisors is an integer number (23420548008).

Almost surely, 2^668569710149 is an apocalyptic number.

It is an amenable number.

668569710149 is a deficient number, since it is larger than the sum of its proper divisors (80887826107).

668569710149 is a wasteful number, since it uses less digits than its factorization.

668569710149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10525.

The product of its (nonzero) digits is 19595520, while the sum is 62.

The spelling of 668569710149 in words is "six hundred sixty-eight billion, five hundred sixty-nine million, seven hundred ten thousand, one hundred forty-nine".