650665566656 has 112 divisors (see below), whose sum is σ = 1499125588992. Its totient is φ = 274422297600.

The previous prime is 650665566653. The next prime is 650665566667. The reversal of 650665566656 is 656665566056.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650665566653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31836761 + ... + 31857191.

Almost surely, 2^650665566656 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 650665566656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (749562794496).

650665566656 is an abundant number, since it is smaller than the sum of its proper divisors (848460022336).

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

650665566656 is a wasteful number, since it uses less digits than its factorization.

650665566656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21578 (or 21568 counting only the distinct ones).

The product of its (nonzero) digits is 174960000, while the sum is 62.

The spelling of 650665566656 in words is "six hundred fifty billion, six hundred sixty-five million, five hundred sixty-six thousand, six hundred fifty-six".