66603613252 has 48 divisors (see below), whose sum is σ = 131083827840. Its totient is φ = 29347718400.

The previous prime is 66603613249. The next prime is 66603613253. The reversal of 66603613252 is 25231630666.

It is not an unprimeable number, because it can be changed into a prime (66603613253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165649 + ... + 400807.

It is an arithmetic number, because the mean of its divisors is an integer number (2730913080).

Almost surely, 2^66603613252 is an apocalyptic number.

It is an amenable number.

66603613252 is a deficient number, since it is larger than the sum of its proper divisors (64480214588).

66603613252 is a wasteful number, since it uses less digits than its factorization.

66603613252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235372 (or 235370 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 40.

The spelling of 66603613252 in words is "sixty-six billion, six hundred three million, six hundred thirteen thousand, two hundred fifty-two".