650665616 has 40 divisors (see below), whose sum is σ = 1339728984. Its totient is φ = 305070080.

The previous prime is 650665597. The next prime is 650665657. The reversal of 650665616 is 616566056.

It can be written as a sum of positive squares in 4 ways, for example, as 428655616 + 222010000 = 20704^2 + 14900^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 72176 + ... + 80688.

Almost surely, 2^650665616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 650665616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (669864492).

650665616 is an abundant number, since it is smaller than the sum of its proper divisors (689063368).

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

650665616 is a wasteful number, since it uses less digits than its factorization.

650665616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8819 (or 8813 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 650665616 is about 25508.1480315604. The cubic root of 650665616 is about 866.5346878582.

The spelling of 650665616 in words is "six hundred fifty million, six hundred sixty-five thousand, six hundred sixteen".