650566601 has 4 divisors (see below), whose sum is σ = 650733204. Its totient is φ = 650400000.

The previous prime is 650566561. The next prime is 650566633. The reversal of 650566601 is 106665056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 308353600 + 342213001 = 17560^2 + 18499^2 .

It is a cyclic number.

It is not a de Polignac number, because 650566601 - 2²⁶ = 583457737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650566691) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 77300 + ... + 85301.

It is an arithmetic number, because the mean of its divisors is an integer number (162683301).

Almost surely, 2^650566601 is an apocalyptic number.

It is an amenable number.

650566601 is a deficient number, since it is larger than the sum of its proper divisors (166603).

650566601 is a wasteful number, since it uses less digits than its factorization.

650566601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166602.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 650566601 is about 25506.2071072906. The cubic root of 650566601 is about 866.4907306741.

The spelling of 650566601 in words is "six hundred fifty million, five hundred sixty-six thousand, six hundred one".