650666057 has 4 divisors (see below), whose sum is σ = 650718336. Its totient is φ = 650613780.

The previous prime is 650666033. The next prime is 650666059. The reversal of 650666057 is 750666056.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 650666057 - 2⁶ = 650665993 is a prime.

It is a Duffinian number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4508 + ... + 36354.

It is an arithmetic number, because the mean of its divisors is an integer number (162679584).

Almost surely, 2^650666057 is an apocalyptic number.

It is an amenable number.

650666057 is a deficient number, since it is larger than the sum of its proper divisors (52279).

650666057 is a wasteful number, since it uses less digits than its factorization.

650666057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52278.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 650666057 is about 25508.1566758557. The cubic root of 650666057 is about 866.5348836278.

Subtracting 650666057 from its reverse (750666056), we obtain a palindrome (99999999).

The spelling of 650666057 in words is "six hundred fifty million, six hundred sixty-six thousand, fifty-seven".