1666995004 has 12 divisors (see below), whose sum is σ = 2957203984. Its totient is φ = 822079584.

The previous prime is 1666994947. The next prime is 1666995017. The reversal of 1666995004 is 4005996661.

It is a congruent 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, 2854152 + ... + 2854735.

Almost surely, 2^1666995004 is an apocalyptic number.

It is an amenable number.

1666995004 is a deficient number, since it is larger than the sum of its proper divisors (1290208980).

1666995004 is a wasteful number, since it uses less digits than its factorization.

1666995004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5708964 (or 5708962 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 1666995004 is about 40828.8501430055. The cubic root of 1666995004 is about 1185.7089537754.

The spelling of 1666995004 in words is "one billion, six hundred sixty-six million, nine hundred ninety-five thousand, four".