1666670608 has 20 divisors (see below), whose sum is σ = 3333342208. Its totient is φ = 806453280.

The previous prime is 1666670591. The next prime is 1666670647. The reversal of 1666670608 is 8060766661.

1666670608 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1679616 + ... + 1680607.

Almost surely, 2^1666670608 is an apocalyptic number.

It is an amenable number.

1666670608 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666670608 is a wasteful number, since it uses less digits than its factorization.

1666670608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360262 (or 3360256 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 1666670608 is about 40824.8773176356. The cubic root of 1666670608 is about 1185.6320360894.

The spelling of 1666670608 in words is "one billion, six hundred sixty-six million, six hundred seventy thousand, six hundred eight".