66347035715231 has 8 divisors (see below), whose sum is σ = 66415984535184. Its totient is φ = 66278115224640.

The previous prime is 66347035715179. The next prime is 66347035715347. The reversal of 66347035715231 is 13251753074366.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66347035715231 is a prime.

It is a super-2 number, since 2×66347035715231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66347035715731) 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, 2394320 + ... + 11765493.

It is an arithmetic number, because the mean of its divisors is an integer number (8301998066898).

Almost surely, 2^{66347035715231} is an apocalyptic number.

66347035715231 is a deficient number, since it is larger than the sum of its proper divisors (68948819953).

66347035715231 is a wasteful number, since it uses less digits than its factorization.

66347035715231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14164681.

The product of its (nonzero) digits is 9525600, while the sum is 53.

Adding to 66347035715231 its reverse (13251753074366), we get a palindrome (79598788789597).

The spelling of 66347035715231 in words is "sixty-six trillion, three hundred forty-seven billion, thirty-five million, seven hundred fifteen thousand, two hundred thirty-one".