3943000066 has 4 divisors (see below), whose sum is σ = 5914500102. Its totient is φ = 1971500032.

The previous prime is 3943000037. The next prime is 3943000067. The reversal of 3943000066 is 6600003493.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2790058041 + 1152942025 = 52821^2 + 33955^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (3943000067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985750015 + ... + 985750018.

Almost surely, 2^3943000066 is an apocalyptic number.

3943000066 is a deficient number, since it is larger than the sum of its proper divisors (1971500036).

3943000066 is a wasteful number, since it uses less digits than its factorization.

3943000066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971500035.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 3943000066 is about 62793.3122712921. The cubic root of 3943000066 is about 1579.8248037864.

The spelling of 3943000066 in words is "three billion, nine hundred forty-three million, sixty-six", and thus it is an aban number.