66599244 has 18 divisors (see below), whose sum is σ = 168348180. Its totient is φ = 22199736.

The previous prime is 66599231. The next prime is 66599249. The reversal of 66599244 is 44299566.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 66599244.

It is not an unprimeable number, because it can be changed into a prime (66599249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 924954 + ... + 925025.

Almost surely, 2^66599244 is an apocalyptic number.

It is an amenable number.

66599244 is an abundant number, since it is smaller than the sum of its proper divisors (101748936).

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

66599244 is a wasteful number, since it uses less digits than its factorization.

66599244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849989 (or 1849984 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 66599244 is about 8160.8359865886. The cubic root of 66599244 is about 405.3433941721.

The spelling of 66599244 in words is "sixty-six million, five hundred ninety-nine thousand, two hundred forty-four".