650666056 has 8 divisors (see below), whose sum is σ = 1219998870. Its totient is φ = 325333024.

The previous prime is 650666033. The next prime is 650666059.

It is a happy number.

650666056 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 592143556 + 58522500 = 24334^2 + 7650^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (650666059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40666621 + ... + 40666636.

Almost surely, 2^650666056 is an apocalyptic number.

It is an amenable number.

650666056 is a deficient number, since it is larger than the sum of its proper divisors (569332814).

650666056 is a wasteful number, since it uses less digits than its factorization.

650666056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81333263 (or 81333259 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 650666056 is about 25508.1566562541. The cubic root of 650666056 is about 866.5348831839.

The spelling of 650666056 in words is "six hundred fifty million, six hundred sixty-six thousand, fifty-six".