6651468978 has 48 divisors (see below), whose sum is σ = 16711141440. Its totient is φ = 1727652960.

The previous prime is 6651468961. The next prime is 6651468983. The reversal of 6651468978 is 8798641566.

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 23 ways as a sum of consecutive naturals, for example, 649333 + ... + 659496.

It is an arithmetic number, because the mean of its divisors is an integer number (348148780).

Almost surely, 2^6651468978 is an apocalyptic number.

6651468978 is an abundant number, since it is smaller than the sum of its proper divisors (10059672462).

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

6651468978 is a wasteful number, since it uses less digits than its factorization.

6651468978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308863 (or 1308852 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 60.

The square root of 6651468978 is about 81556.5385361591. The cubic root of 6651468978 is about 1880.6408123703.

The spelling of 6651468978 in words is "six billion, six hundred fifty-one million, four hundred sixty-eight thousand, nine hundred seventy-eight".