6431443066 has 4 divisors (see below), whose sum is σ = 9647164602. Its totient is φ = 3215721532.

The previous prime is 6431443061. The next prime is 6431443091. The reversal of 6431443066 is 6603441346.

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., 3472627041 + 2958816025 = 58929^2 + 54395^2 .

It is a super-2 number, since 2×6431443066² = 82726919822398960712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6431443061) by changing a digit.

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, 1607860765 + ... + 1607860768.

Almost surely, 2^6431443066 is an apocalyptic number.

6431443066 is a deficient number, since it is larger than the sum of its proper divisors (3215721536).

6431443066 is a wasteful number, since it uses less digits than its factorization.

6431443066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215721535.

The product of its (nonzero) digits is 124416, while the sum is 37.

The square root of 6431443066 is about 80196.2783799847. The cubic root of 6431443066 is about 1859.6711047940.

The spelling of 6431443066 in words is "six billion, four hundred thirty-one million, four hundred forty-three thousand, sixty-six".