1666673585 has 8 divisors (see below), whose sum is σ = 2027406120. Its totient is φ = 1315073664.

The previous prime is 1666673579. The next prime is 1666673609. The reversal of 1666673585 is 5853766661.

It can be written as a sum of positive squares in 4 ways, for example, as 2686321 + 1663987264 = 1639^2 + 40792^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1666673585 is a prime.

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, 2282750 + ... + 2283479.

It is an arithmetic number, because the mean of its divisors is an integer number (253425765).

Almost surely, 2^1666673585 is an apocalyptic number.

It is an amenable number.

1666673585 is a deficient number, since it is larger than the sum of its proper divisors (360732535).

1666673585 is an equidigital number, since it uses as much as digits as its factorization.

1666673585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4566307.

The product of its digits is 5443200, while the sum is 53.

The square root of 1666673585 is about 40824.9137782311. The cubic root of 1666673585 is about 1185.6327420127.

The spelling of 1666673585 in words is "one billion, six hundred sixty-six million, six hundred seventy-three thousand, five hundred eighty-five".