66386733768365 has 8 divisors (see below), whose sum is σ = 82233889571328. Its totient is φ = 51396180981840.

The previous prime is 66386733768347. The next prime is 66386733768373. The reversal of 66386733768365 is 56386733768366.

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

It is not a de Polignac number, because 66386733768365 - 2¹² = 66386733764269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214150753937 + ... + 214150754246.

It is an arithmetic number, because the mean of its divisors is an integer number (10279236196416).

Almost surely, 2^{66386733768365} is an apocalyptic number.

It is an amenable number.

66386733768365 is a deficient number, since it is larger than the sum of its proper divisors (15847155802963).

66386733768365 is a wasteful number, since it uses less digits than its factorization.

66386733768365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428301508219.

The product of its digits is 9876142080, while the sum is 77.

Subtracting from 66386733768365 its reverse (56386733768366), we obtain a palindrome (9999999999999).

The spelling of 66386733768365 in words is "sixty-six trillion, three hundred eighty-six billion, seven hundred thirty-three million, seven hundred sixty-eight thousand, three hundred sixty-five".