66366346738 has 16 divisors (see below), whose sum is σ = 101128547520. Its totient is φ = 32658469200.

The previous prime is 66366346681. The next prime is 66366346771. The reversal of 66366346738 is 83764366366.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 328173 + ... + 490336.

It is an arithmetic number, because the mean of its divisors is an integer number (6320534220).

Almost surely, 2^66366346738 is an apocalyptic number.

66366346738 is a deficient number, since it is larger than the sum of its proper divisors (34762200782).

66366346738 is a wasteful number, since it uses less digits than its factorization.

66366346738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819153.

The product of its digits is 47029248, while the sum is 58.

The spelling of 66366346738 in words is "sixty-six billion, three hundred sixty-six million, three hundred forty-six thousand, seven hundred thirty-eight".