649666024 has 32 divisors (see below), whose sum is σ = 1401379200. Its totient is φ = 276580800.

The previous prime is 649665979. The next prime is 649666049. The reversal of 649666024 is 420666946.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29959 + ... + 46870.

It is an arithmetic number, because the mean of its divisors is an integer number (43793100).

Almost surely, 2^649666024 is an apocalyptic number.

It is an amenable number.

649666024 is an abundant number, since it is smaller than the sum of its proper divisors (751713176).

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

649666024 is a wasteful number, since it uses less digits than its factorization.

649666024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76993 (or 76989 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 43.

The square root of 649666024 is about 25488.5469181748. The cubic root of 649666024 is about 866.0907193745.

The spelling of 649666024 in words is "six hundred forty-nine million, six hundred sixty-six thousand, twenty-four".