66703343968 has 24 divisors (see below), whose sum is σ = 133548012360. Its totient is φ = 32786388480.

The previous prime is 66703343929. The next prime is 66703343981. The reversal of 66703343968 is 86934330766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17663193 + ... + 17666968.

It is an arithmetic number, because the mean of its divisors is an integer number (5564500515).

Almost surely, 2^66703343968 is an apocalyptic number.

It is an amenable number.

66703343968 is an abundant number, since it is smaller than the sum of its proper divisors (66844668392).

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

66703343968 is a wasteful number, since it uses less digits than its factorization.

66703343968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35330230 (or 35330222 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 55.

The spelling of 66703343968 in words is "sixty-six billion, seven hundred three million, three hundred forty-three thousand, nine hundred sixty-eight".