650708661 has 8 divisors (see below), whose sum is σ = 868821120. Its totient is φ = 433200992.

The previous prime is 650708659. The next prime is 650708671. The reversal of 650708661 is 166807056.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 650708661 - 2¹ = 650708659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650708621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148680 + ... + 152993.

It is an arithmetic number, because the mean of its divisors is an integer number (108602640).

Almost surely, 2^650708661 is an apocalyptic number.

It is an amenable number.

650708661 is a deficient number, since it is larger than the sum of its proper divisors (218112459).

650708661 is a wasteful number, since it uses less digits than its factorization.

650708661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302395.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 650708661 is about 25508.9917676101. The cubic root of 650708661 is about 866.5537960668.

The spelling of 650708661 in words is "six hundred fifty million, seven hundred eight thousand, six hundred sixty-one".