3985030666 has 4 divisors (see below), whose sum is σ = 5977546002. Its totient is φ = 1992515332.

The previous prime is 3985030663. The next prime is 3985030697. The reversal of 3985030666 is 6660305893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6660305893 = 1093 ⋅6093601.

It can be written as a sum of positive squares in only one way, i.e., 3964591225 + 20439441 = 62965^2 + 4521^2 .

It is not an unprimeable number, because it can be changed into a prime (3985030661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996257665 + ... + 996257668.

Almost surely, 2^3985030666 is an apocalyptic number.

3985030666 is a deficient number, since it is larger than the sum of its proper divisors (1992515336).

3985030666 is a wasteful number, since it uses less digits than its factorization.

3985030666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992515335.

The product of its (nonzero) digits is 699840, while the sum is 46.

The square root of 3985030666 is about 63127.0992997461. The cubic root of 3985030666 is about 1585.4183819251.

The spelling of 3985030666 in words is "three billion, nine hundred eighty-five million, thirty thousand, six hundred sixty-six".