650012661 has 16 divisors (see below), whose sum is σ = 964533120. Its totient is φ = 432643680.

The previous prime is 650012651. The next prime is 650012687. The reversal of 650012661 is 166210056.

It is a happy number.

650012661 is a `hidden beast` number, since 650 + 0 + 1 + 2 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 650012661 - 2¹⁵ = 649979893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650012611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2040 + ... + 36113.

It is an arithmetic number, because the mean of its divisors is an integer number (60283320).

Almost surely, 2^650012661 is an apocalyptic number.

It is an amenable number.

650012661 is a deficient number, since it is larger than the sum of its proper divisors (314520459).

650012661 is a wasteful number, since it uses less digits than its factorization.

650012661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38793 (or 38787 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 650012661 is about 25495.3458693935. The cubic root of 650012661 is about 866.2447296394.

The spelling of 650012661 in words is "six hundred fifty million, twelve thousand, six hundred sixty-one".