66634085441 has 12 divisors (see below), whose sum is σ = 83705629056. Its totient is φ = 51922663320.

The previous prime is 66634085417. The next prime is 66634085447. The reversal of 66634085441 is 14458043666.

66634085441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-66634085441 is a prime.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66634085447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39334505 + ... + 39336198.

It is an arithmetic number, because the mean of its divisors is an integer number (6975469088).

Almost surely, 2^66634085441 is an apocalyptic number.

It is an amenable number.

66634085441 is a deficient number, since it is larger than the sum of its proper divisors (17071543615).

66634085441 is a wasteful number, since it uses less digits than its factorization.

66634085441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78670732 (or 78670721 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 66634085441 in words is "sixty-six billion, six hundred thirty-four million, eighty-five thousand, four hundred forty-one".