648622866 has 8 divisors (see below), whose sum is σ = 1297245744. Its totient is φ = 216207620.

The previous prime is 648622861. The next prime is 648622867. The reversal of 648622866 is 668226846.

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

648622866 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (648622861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54051900 + ... + 54051911.

It is an arithmetic number, because the mean of its divisors is an integer number (162155718).

Almost surely, 2^648622866 is an apocalyptic number.

648622866 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.

648622866 is a wasteful number, since it uses less digits than its factorization.

648622866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108103816.

The product of its digits is 1327104, while the sum is 48.

The square root of 648622866 is about 25468.0754278764. The cubic root of 648622866 is about 865.6269151925.

The spelling of 648622866 in words is "six hundred forty-eight million, six hundred twenty-two thousand, eight hundred sixty-six".