3995267866 has 4 divisors (see below), whose sum is σ = 5992901802. Its totient is φ = 1997633932.

The previous prime is 3995267851. The next prime is 3995267917. The reversal of 3995267866 is 6687625993.

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., 3710637225 + 284630641 = 60915^2 + 16871^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998816965 + ... + 998816968.

Almost surely, 2^3995267866 is an apocalyptic number.

3995267866 is a deficient number, since it is larger than the sum of its proper divisors (1997633936).

3995267866 is a wasteful number, since it uses less digits than its factorization.

3995267866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997633935.

The product of its digits is 29393280, while the sum is 61.

The square root of 3995267866 is about 63208.1313281764. The cubic root of 3995267866 is about 1586.7748220788.

The spelling of 3995267866 in words is "three billion, nine hundred ninety-five million, two hundred sixty-seven thousand, eight hundred sixty-six".