668763045496 has 384 divisors, whose sum is σ = 1669662720000. Its totient is φ = 245295198720.

The previous prime is 668763045493. The next prime is 668763045529. The reversal of 668763045496 is 694540367866.

It is a happy number.

It is a super-3 number, since 3×668763045496³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668763045493) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1340206255 + ... + 1340206753.

It is an arithmetic number, because the mean of its divisors is an integer number (4348080000).

Almost surely, 2^668763045496 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 668763045496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (834831360000).

668763045496 is an abundant number, since it is smaller than the sum of its proper divisors (1000899674504).

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

668763045496 is a wasteful number, since it uses less digits than its factorization.

668763045496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 64.

The spelling of 668763045496 in words is "six hundred sixty-eight billion, seven hundred sixty-three million, forty-five thousand, four hundred ninety-six".