1585919966 has 32 divisors (see below), whose sum is σ = 2541127680. Its totient is φ = 740589696.

The previous prime is 1585919903. The next prime is 1585919977. The reversal of 1585919966 is 6699195851.

It is a Curzon number.

It is a congruent 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, 1571270 + ... + 1572278.

It is an arithmetic number, because the mean of its divisors is an integer number (79410240).

Almost surely, 2^1585919966 is an apocalyptic number.

1585919966 is a deficient number, since it is larger than the sum of its proper divisors (955207714).

1585919966 is a wasteful number, since it uses less digits than its factorization.

1585919966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808.

The product of its digits is 5248800, while the sum is 59.

The square root of 1585919966 is about 39823.6106600092. The cubic root of 1585919966 is about 1166.1661261613.

The spelling of 1585919966 in words is "one billion, five hundred eighty-five million, nine hundred nineteen thousand, nine hundred sixty-six".