6678756442 has 8 divisors (see below), whose sum is σ = 10607436756. Its totient is φ = 3142944192.

The previous prime is 6678756437. The next prime is 6678756451. The reversal of 6678756442 is 2446578766.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6289917481 + 388838961 = 79309^2 + 19719^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×6678756442² = 89211575223112998728, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 98216973 + ... + 98217040.

Almost surely, 2^6678756442 is an apocalyptic number.

6678756442 is a deficient number, since it is larger than the sum of its proper divisors (3928680314).

6678756442 is a wasteful number, since it uses less digits than its factorization.

6678756442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196434032.

The product of its digits is 13547520, while the sum is 55.

The square root of 6678756442 is about 81723.6590101055. The cubic root of 6678756442 is about 1883.2090621494.

The spelling of 6678756442 in words is "six billion, six hundred seventy-eight million, seven hundred fifty-six thousand, four hundred forty-two".