66500940380 has 48 divisors (see below), whose sum is σ = 159619373760. Its totient is φ = 22797877248.

The previous prime is 66500940347. The next prime is 66500940421. The reversal of 66500940380 is 8304900566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1701134 + ... + 1739786.

It is an arithmetic number, because the mean of its divisors is an integer number (3325403620).

Almost surely, 2^66500940380 is an apocalyptic number.

It is an amenable number.

66500940380 is an abundant number, since it is smaller than the sum of its proper divisors (93118433380).

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

66500940380 is a wasteful number, since it uses less digits than its factorization.

66500940380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50958 (or 50956 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 66500940380 in words is "sixty-six billion, five hundred million, nine hundred forty thousand, three hundred eighty".