1605992066 has 32 divisors (see below), whose sum is σ = 2907491328. Its totient is φ = 650414160.

The previous prime is 1605992053. The next prime is 1605992123. The reversal of 1605992066 is 6602995061.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3320 + ... + 56771.

It is an arithmetic number, because the mean of its divisors is an integer number (90859104).

Almost surely, 2^1605992066 is an apocalyptic number.

1605992066 is a deficient number, since it is larger than the sum of its proper divisors (1301499262).

1605992066 is a wasteful number, since it uses less digits than its factorization.

1605992066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60206.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 1605992066 is about 40074.8308293373. The cubic root of 1605992066 is about 1171.0653519929.

The spelling of 1605992066 in words is "one billion, six hundred five million, nine hundred ninety-two thousand, sixty-six".