66601431565133 has 8 divisors (see below), whose sum is σ = 67725526054560. Its totient is φ = 65486665661040.

The previous prime is 66601431565121. The next prime is 66601431565159. The reversal of 66601431565133 is 33156513410666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66601431565133 - 2⁴ = 66601431565117 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 (66601431525133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2332131935 + ... + 2332160492.

It is an arithmetic number, because the mean of its divisors is an integer number (8465690756820).

Almost surely, 2^{66601431565133} is an apocalyptic number.

It is an amenable number.

66601431565133 is a deficient number, since it is larger than the sum of its proper divisors (1124094489427).

66601431565133 is a wasteful number, since it uses less digits than its factorization.

66601431565133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4664292667.

The product of its (nonzero) digits is 3499200, while the sum is 50.

Adding to 66601431565133 its reverse (33156513410666), we get a palindrome (99757944975799).

The spelling of 66601431565133 in words is "sixty-six trillion, six hundred one billion, four hundred thirty-one million, five hundred sixty-five thousand, one hundred thirty-three".