66386733768366 has 32 divisors (see below), whose sum is σ = 147576684336768. Its totient is φ = 19737622388640.

The previous prime is 66386733768347. The next prime is 66386733768373.

It is a happy number.

66386733768366 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66386733768291 and 66386733768300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9489238036 + ... + 9489245031.

It is an arithmetic number, because the mean of its divisors is an integer number (4611771385524).

Almost surely, 2^{66386733768366} is an apocalyptic number.

66386733768366 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66386733768366 is an abundant number, since it is smaller than the sum of its proper divisors (81189950568402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66386733768366 is a wasteful number, since it uses less digits than its factorization.

66386733768366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18978483136.

The product of its digits is 11851370496, while the sum is 78.

The spelling of 66386733768366 in words is "sixty-six trillion, three hundred eighty-six billion, seven hundred thirty-three million, seven hundred sixty-eight thousand, three hundred sixty-six".