3966021803 has 2 divisors, whose sum is σ = 3966021804. Its totient is φ = 3966021802.

The previous prime is 3966021793. The next prime is 3966021847. The reversal of 3966021803 is 3081206693.

3966021803 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3966021803 - 2⁶ = 3966021739 is a prime.

It is not a weakly prime, because it can be changed into another prime (3966021883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1983010901 + 1983010902.

It is an arithmetic number, because the mean of its divisors is an integer number (1983010902).

Almost surely, 2^3966021803 is an apocalyptic number.

3966021803 is a deficient number, since it is larger than the sum of its proper divisors (1).

3966021803 is an equidigital number, since it uses as much as digits as its factorization.

3966021803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 3966021803 is about 62976.3590802136. The cubic root of 3966021803 is about 1582.8935124620.

The spelling of 3966021803 in words is "three billion, nine hundred sixty-six million, twenty-one thousand, eight hundred three".