1669584985 has 16 divisors (see below), whose sum is σ = 2055779712. Its totient is φ = 1300924800.

The previous prime is 1669584953. The next prime is 1669584991. The reversal of 1669584985 is 5894859661.

It is not a de Polignac number, because 1669584985 - 2⁵ = 1669584953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122902 + ... + 135808.

It is an arithmetic number, because the mean of its divisors is an integer number (128486232).

Almost surely, 2^1669584985 is an apocalyptic number.

It is an amenable number.

1669584985 is a deficient number, since it is larger than the sum of its proper divisors (386194727).

1669584985 is a wasteful number, since it uses less digits than its factorization.

1669584985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13584.

The product of its digits is 18662400, while the sum is 61.

The square root of 1669584985 is about 40860.5553682277. Note that the first 3 decimals coincide. The cubic root of 1669584985 is about 1186.3227077842.

The spelling of 1669584985 in words is "one billion, six hundred sixty-nine million, five hundred eighty-four thousand, nine hundred eighty-five".