66846621056 has 32 divisors (see below), whose sum is σ = 133968476880. Its totient is φ = 33223160320.

The previous prime is 66846621041. The next prime is 66846621103. The reversal of 66846621056 is 65012664866.

66846621056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 66846620995 and 66846621013.

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, 1542215 + ... + 1584966.

Almost surely, 2^66846621056 is an apocalyptic number.

It is an amenable number.

66846621056 is an abundant number, since it is smaller than the sum of its proper divisors (67121855824).

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

66846621056 is a wasteful number, since it uses less digits than its factorization.

66846621056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127362 (or 3127350 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 66846621056 in words is "sixty-six billion, eight hundred forty-six million, six hundred twenty-one thousand, fifty-six".