83819866 has 16 divisors (see below), whose sum is σ = 141289344. Its totient is φ = 37003824.

The previous prime is 83819863. The next prime is 83819899. The reversal of 83819866 is 66891838.

It is not an unprimeable number, because it can be changed into a prime (83819863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69486 + ... + 70681.

It is an arithmetic number, because the mean of its divisors is an integer number (8830584).

Almost surely, 2^83819866 is an apocalyptic number.

83819866 is a deficient number, since it is larger than the sum of its proper divisors (57469478).

83819866 is a wasteful number, since it uses less digits than its factorization.

83819866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140205.

The product of its digits is 497664, while the sum is 49.

The square root of 83819866 is about 9155.3190004500. The cubic root of 83819866 is about 437.6386342692.

The spelling of 83819866 in words is "eighty-three million, eight hundred nineteen thousand, eight hundred sixty-six".