650660001 has 4 divisors (see below), whose sum is σ = 867546672. Its totient is φ = 433773332.

The previous prime is 650659969. The next prime is 650660039. The reversal of 650660001 is 100066056.

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.

It is a cyclic number.

It is not a de Polignac number, because 650660001 - 2⁵ = 650659969 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (650660051) 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, 108443331 + ... + 108443336.

It is an arithmetic number, because the mean of its divisors is an integer number (216886668).

Almost surely, 2^650660001 is an apocalyptic number.

It is an amenable number.

650660001 is a deficient number, since it is larger than the sum of its proper divisors (216886671).

650660001 is a wasteful number, since it uses less digits than its factorization.

650660001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216886670.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 650660001 is about 25508.0379684522. The cubic root of 650660001 is about 866.5321952280.

The spelling of 650660001 in words is "six hundred fifty million, six hundred sixty thousand, one".