66138096357 has 12 divisors (see below), whose sum is σ = 96012872800. Its totient is φ = 43870494888.

The previous prime is 66138096331. The next prime is 66138096391. The reversal of 66138096357 is 75369083166.

66138096357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66138096357 - 2¹⁶ = 66138030821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66138096317) 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, 18462223 + ... + 18465804.

Almost surely, 2^66138096357 is an apocalyptic number.

It is an amenable number.

66138096357 is a deficient number, since it is larger than the sum of its proper divisors (29874776443).

66138096357 is a wasteful number, since it uses less digits than its factorization.

66138096357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36928232 (or 36928229 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 66138096357 in words is "sixty-six billion, one hundred thirty-eight million, ninety-six thousand, three hundred fifty-seven".