66396069366 has 96 divisors (see below), whose sum is σ = 150091619328. Its totient is φ = 19554480000.

The previous prime is 66396069361. The next prime is 66396069379.

66396069366 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66396069361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8062471 + ... + 8070701.

It is an arithmetic number, because the mean of its divisors is an integer number (1563454368).

Almost surely, 2^66396069366 is an apocalyptic number.

66396069366 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 66396069366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75045809664).

66396069366 is an abundant number, since it is smaller than the sum of its proper divisors (83695549962).

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

66396069366 is a wasteful number, since it uses less digits than its factorization.

66396069366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8570 (or 8559 counting only the distinct ones).

The product of its (nonzero) digits is 34012224, while the sum is 60.

The spelling of 66396069366 in words is "sixty-six billion, three hundred ninety-six million, sixty-nine thousand, three hundred sixty-six".