6319666442 has 4 divisors (see below), whose sum is σ = 9479499666. Its totient is φ = 3159833220.

The previous prime is 6319666439. The next prime is 6319666447. The reversal of 6319666442 is 2446669136.

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., 5712487561 + 607178881 = 75581^2 + 24641^2 .

It is not an unprimeable number, because it can be changed into a prime (6319666447) 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, 1579916609 + ... + 1579916612.

Almost surely, 2^6319666442 is an apocalyptic number.

6319666442 is a deficient number, since it is larger than the sum of its proper divisors (3159833224).

6319666442 is a wasteful number, since it uses less digits than its factorization.

6319666442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159833223.

The product of its digits is 1119744, while the sum is 47.

The square root of 6319666442 is about 79496.3297391773. The cubic root of 6319666442 is about 1848.8345658992.

The spelling of 6319666442 in words is "six billion, three hundred nineteen million, six hundred sixty-six thousand, four hundred forty-two".