66650244 has 12 divisors (see below), whose sum is σ = 155517264. Its totient is φ = 22216744.

The previous prime is 66650219. The next prime is 66650257. The reversal of 66650244 is 44205666.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2777082 + ... + 2777105.

It is an arithmetic number, because the mean of its divisors is an integer number (12959772).

Almost surely, 2^66650244 is an apocalyptic number.

It is an amenable number.

66650244 is an abundant number, since it is smaller than the sum of its proper divisors (88867020).

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

66650244 is a wasteful number, since it uses less digits than its factorization.

66650244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5554194 (or 5554192 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 66650244 is about 8163.9600684962. The cubic root of 66650244 is about 405.4468349785.

The spelling of 66650244 in words is "sixty-six million, six hundred fifty thousand, two hundred forty-four".