6672222778 has 8 divisors (see below), whose sum is σ = 10778206068. Its totient is φ = 3079487424.

The previous prime is 6672222769. The next prime is 6672222779. The reversal of 6672222778 is 8772222766.

It can be written as a sum of positive squares in 2 ways, for example, as 6638501529 + 33721249 = 81477^2 + 5807^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6672222779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128311951 + ... + 128312002.

Almost surely, 2^6672222778 is an apocalyptic number.

6672222778 is a deficient number, since it is larger than the sum of its proper divisors (4105983290).

6672222778 is a wasteful number, since it uses less digits than its factorization.

6672222778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256623968.

The product of its digits is 1580544, while the sum is 49.

The square root of 6672222778 is about 81683.6751009649. The cubic root of 6672222778 is about 1882.5947626731.

The spelling of 6672222778 in words is "six billion, six hundred seventy-two million, two hundred twenty-two thousand, seven hundred seventy-eight".