66603244 has 6 divisors (see below), whose sum is σ = 116555684. Its totient is φ = 33301620.

The previous prime is 66603233. The next prime is 66603247. The reversal of 66603244 is 44230666.

It is a super-2 number, since 2×66603244² = 8871984222647072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66603247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8325402 + ... + 8325409.

Almost surely, 2^66603244 is an apocalyptic number.

It is an amenable number.

66603244 is a deficient number, since it is larger than the sum of its proper divisors (49952440).

66603244 is a wasteful number, since it uses less digits than its factorization.

66603244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16650815 (or 16650813 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 66603244 is about 8161.0810558406. The cubic root of 66603244 is about 405.3515090846.

The spelling of 66603244 in words is "sixty-six million, six hundred three thousand, two hundred forty-four".