3901666999 has 2 divisors, whose sum is σ = 3901667000. Its totient is φ = 3901666998.

The previous prime is 3901666973. The next prime is 3901667009. The reversal of 3901666999 is 9996661093.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3901666999 - 2⁷ = 3901666871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3901666099) 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 as a sum of consecutive naturals, namely, 1950833499 + 1950833500.

It is an arithmetic number, because the mean of its divisors is an integer number (1950833500).

Almost surely, 2^3901666999 is an apocalyptic number.

3901666999 is a deficient number, since it is larger than the sum of its proper divisors (1).

3901666999 is an equidigital number, since it uses as much as digits as its factorization.

3901666999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4251528, while the sum is 58.

The square root of 3901666999 is about 62463.3252316910. The cubic root of 3901666999 is about 1574.2851545977.

The spelling of 3901666999 in words is "three billion, nine hundred one million, six hundred sixty-six thousand, nine hundred ninety-nine".