668712485376 has 480 divisors, whose sum is σ = 2225080585728. Its totient is φ = 199105413120.

The previous prime is 668712485369. The next prime is 668712485423. The reversal of 668712485376 is 673584217866.

668712485376 is a `hidden beast` number, since 6 + 6 + 8 + 71 + 24 + 8 + 537 + 6 = 666.

It is a super-2 number, since 2×668712485376² (a number of 24 digits) contains 22 as substring.

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, 50132980 + ... + 50146316.

Almost surely, 2^668712485376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668712485376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1112540292864).

668712485376 is an abundant number, since it is smaller than the sum of its proper divisors (1556368100352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668712485376 is a wasteful number, since it uses less digits than its factorization.

668712485376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13414 (or 13386 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 63.

The spelling of 668712485376 in words is "six hundred sixty-eight billion, seven hundred twelve million, four hundred eighty-five thousand, three hundred seventy-six".