83721367166818 has 16 divisors (see below), whose sum is σ = 132622224023520. Its totient is φ = 39528312214176.

The previous prime is 83721367166783. The next prime is 83721367166867. The reversal of 83721367166818 is 81866176312738.

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, 3588251971 + ... + 3588275302.

It is an arithmetic number, because the mean of its divisors is an integer number (8288889001470).

Almost surely, 2^{83721367166818} is an apocalyptic number.

83721367166818 is a deficient number, since it is larger than the sum of its proper divisors (48900856856702).

83721367166818 is a wasteful number, since it uses less digits than its factorization.

83721367166818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7176527601.

The product of its digits is 97542144, while the sum is 67.

The spelling of 83721367166818 in words is "eighty-three trillion, seven hundred twenty-one billion, three hundred sixty-seven million, one hundred sixty-six thousand, eight hundred eighteen".