6668154478 has 8 divisors (see below), whose sum is σ = 10004159520. Its totient is φ = 3333434640.

The previous prime is 6668154473. The next prime is 6668154569. The reversal of 6668154478 is 8744518666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668154473) 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, 308223 + ... + 329146.

It is an arithmetic number, because the mean of its divisors is an integer number (1250519940).

Almost surely, 2^6668154478 is an apocalyptic number.

6668154478 is a deficient number, since it is larger than the sum of its proper divisors (3336005042).

6668154478 is a wasteful number, since it uses less digits than its factorization.

6668154478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642602.

The product of its digits is 7741440, while the sum is 55.

The square root of 6668154478 is about 81658.7685310035. The cubic root of 6668154478 is about 1882.2120557549.

The spelling of 6668154478 in words is "six billion, six hundred sixty-eight million, one hundred fifty-four thousand, four hundred seventy-eight".