66635244 has 96 divisors (see below), whose sum is σ = 192174080. Its totient is φ = 19828800.

The previous prime is 66635227. The next prime is 66635263. The reversal of 66635244 is 44253666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 66635199 and 66635208.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42759 + ... + 44289.

Almost surely, 2^66635244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66635244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96087040).

66635244 is an abundant number, since it is smaller than the sum of its proper divisors (125538836).

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

66635244 is a wasteful number, since it uses less digits than its factorization.

66635244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588 (or 1580 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 66635244 is about 8163.0413449890. The cubic root of 66635244 is about 405.4164166912.

The spelling of 66635244 in words is "sixty-six million, six hundred thirty-five thousand, two hundred forty-four".