66523842680 has 16 divisors (see below), whose sum is σ = 149678646120. Its totient is φ = 26609537056.

The previous prime is 66523842673. The next prime is 66523842691. The reversal of 66523842680 is 8624832566.

66523842680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 831547994 + ... + 831548073.

Almost surely, 2^66523842680 is an apocalyptic number.

It is an amenable number.

66523842680 is an abundant number, since it is smaller than the sum of its proper divisors (83154803440).

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

66523842680 is a wasteful number, since it uses less digits than its factorization.

66523842680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663096078 (or 1663096074 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 50.

The spelling of 66523842680 in words is "sixty-six billion, five hundred twenty-three million, eight hundred forty-two thousand, six hundred eighty".