3991606606 has 24 divisors (see below), whose sum is σ = 6580212984. Its totient is φ = 1814772960.

The previous prime is 3991606601. The next prime is 3991606607. The reversal of 3991606606 is 6066061993.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991606601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65485 + ... + 110776.

It is an arithmetic number, because the mean of its divisors is an integer number (274175541).

Almost surely, 2^3991606606 is an apocalyptic number.

3991606606 is a deficient number, since it is larger than the sum of its proper divisors (2588606378).

3991606606 is a wasteful number, since it uses less digits than its factorization.

3991606606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176356 (or 176343 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 46.

The square root of 3991606606 is about 63179.1627516541. The cubic root of 3991606606 is about 1586.2899675859.

The spelling of 3991606606 in words is "three billion, nine hundred ninety-one million, six hundred six thousand, six hundred six".