66380636506 has 8 divisors (see below), whose sum is σ = 101258598240. Its totient is φ = 32627770428.

The previous prime is 66380636501. The next prime is 66380636507. The reversal of 66380636506 is 60563608366.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66380636506.

It is not an unprimeable number, because it can be changed into a prime (66380636501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281273766 + ... + 281274001.

It is an arithmetic number, because the mean of its divisors is an integer number (12657324780).

Almost surely, 2^66380636506 is an apocalyptic number.

66380636506 is a deficient number, since it is larger than the sum of its proper divisors (34877961734).

66380636506 is a wasteful number, since it uses less digits than its factorization.

66380636506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562547828.

The product of its (nonzero) digits is 2799360, while the sum is 49.

The spelling of 66380636506 in words is "sixty-six billion, three hundred eighty million, six hundred thirty-six thousand, five hundred six".