3966355917 has 10 divisors (see below), whose sum is σ = 5925050318. Its totient is φ = 2644237224.

The previous prime is 3966355909. The next prime is 3966355961. The reversal of 3966355917 is 7195536693.

It can be written as a sum of positive squares in only one way, i.e., 2910170916 + 1056185001 = 53946^2 + 32499^2 .

It is not a de Polignac number, because 3966355917 - 2³ = 3966355909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3966355907) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 24483598 + ... + 24483759.

Almost surely, 2^3966355917 is an apocalyptic number.

It is an amenable number.

3966355917 is a deficient number, since it is larger than the sum of its proper divisors (1958694401).

3966355917 is an equidigital number, since it uses as much as digits as its factorization.

3966355917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48967369 (or 48967360 counting only the distinct ones).

The product of its digits is 4592700, while the sum is 54.

The square root of 3966355917 is about 62979.0117181907. The cubic root of 3966355917 is about 1582.9379610353.

The spelling of 3966355917 in words is "three billion, nine hundred sixty-six million, three hundred fifty-five thousand, nine hundred seventeen".