1609810066 has 32 divisors (see below), whose sum is σ = 2604607488. Its totient is φ = 744366480.

The previous prime is 1609810063. The next prime is 1609810079. The reversal of 1609810066 is 6600189061.

It is not an unprimeable number, because it can be changed into a prime (1609810063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174961 + ... + 183931.

It is an arithmetic number, because the mean of its divisors is an integer number (81393984).

Almost surely, 2^1609810066 is an apocalyptic number.

1609810066 is a deficient number, since it is larger than the sum of its proper divisors (994797422).

1609810066 is a wasteful number, since it uses less digits than its factorization.

1609810066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9126.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1609810066 is about 40122.4384353693. The cubic root of 1609810066 is about 1171.9926270275.

The spelling of 1609810066 in words is "one billion, six hundred nine million, eight hundred ten thousand, sixty-six".