83666816 has 16 divisors (see below), whose sum is σ = 166680240. Its totient is φ = 41833344.

The previous prime is 83666813. The next prime is 83666873. The reversal of 83666816 is 61866638.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83666813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326696 + ... + 326951.

It is an arithmetic number, because the mean of its divisors is an integer number (10417515).

Almost surely, 2^83666816 is an apocalyptic number.

It is an amenable number.

83666816 is a deficient number, since it is larger than the sum of its proper divisors (83013424).

83666816 is an equidigital number, since it uses as much as digits as its factorization.

83666816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653661 (or 653649 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The square root of 83666816 is about 9146.9566523516. The cubic root of 83666816 is about 437.3721047654.

The spelling of 83666816 in words is "eighty-three million, six hundred sixty-six thousand, eight hundred sixteen".