83805990566 has 16 divisors (see below), whose sum is σ = 126880300800. Its totient is φ = 41513626440.

The previous prime is 83805990559. The next prime is 83805990577. The reversal of 83805990566 is 66509950838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110066 + ... + 423941.

It is an arithmetic number, because the mean of its divisors is an integer number (7930018800).

Almost surely, 2^83805990566 is an apocalyptic number.

83805990566 is a deficient number, since it is larger than the sum of its proper divisors (43074310234).

83805990566 is a wasteful number, since it uses less digits than its factorization.

83805990566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534739.

The product of its (nonzero) digits is 13996800, while the sum is 59.

The spelling of 83805990566 in words is "eighty-three billion, eight hundred five million, nine hundred ninety thousand, five hundred sixty-six".