6648354978 has 8 divisors (see below), whose sum is σ = 13296709968. Its totient is φ = 2216118324.

The previous prime is 6648354941. The next prime is 6648354989. The reversal of 6648354978 is 8794538466.

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

6648354978 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554029576 + ... + 554029587.

It is an arithmetic number, because the mean of its divisors is an integer number (1662088746).

Almost surely, 2^6648354978 is an apocalyptic number.

6648354978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6648354978 is a wasteful number, since it uses less digits than its factorization.

6648354978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108059168.

The product of its digits is 34836480, while the sum is 60.

The square root of 6648354978 is about 81537.4452506332. The cubic root of 6648354978 is about 1880.3472817402.

The spelling of 6648354978 in words is "six billion, six hundred forty-eight million, three hundred fifty-four thousand, nine hundred seventy-eight".