649300660 has 12 divisors (see below), whose sum is σ = 1363531428. Its totient is φ = 259720256.

The previous prime is 649300651. The next prime is 649300667. The reversal of 649300660 is 66003946.

649300660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 128913316 + 520387344 = 11354^2 + 22812^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649300667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16232497 + ... + 16232536.

It is an arithmetic number, because the mean of its divisors is an integer number (113627619).

Almost surely, 2^649300660 is an apocalyptic number.

It is an amenable number.

649300660 is an abundant number, since it is smaller than the sum of its proper divisors (714230768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649300660 is a wasteful number, since it uses less digits than its factorization.

649300660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32465042 (or 32465040 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 649300660 is about 25481.3786911148. The cubic root of 649300660 is about 865.9283294199.

The spelling of 649300660 in words is "six hundred forty-nine million, three hundred thousand, six hundred sixty".