6645469078 has 8 divisors (see below), whose sum is σ = 9968790168. Its totient is φ = 3322539024.

The previous prime is 6645469067. The next prime is 6645469081. The reversal of 6645469078 is 8709645466.

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

It is a congruent number.

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, 50751 + ... + 125962.

It is an arithmetic number, because the mean of its divisors is an integer number (1246098771).

Almost surely, 2^6645469078 is an apocalyptic number.

6645469078 is a deficient number, since it is larger than the sum of its proper divisors (3323321090).

6645469078 is a wasteful number, since it uses less digits than its factorization.

6645469078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195518.

The product of its (nonzero) digits is 8709120, while the sum is 55.

The square root of 6645469078 is about 81519.7465525991. The cubic root of 6645469078 is about 1880.0751703382.

The spelling of 6645469078 in words is "six billion, six hundred forty-five million, four hundred sixty-nine thousand, seventy-eight".