66231752 has 8 divisors (see below), whose sum is σ = 124184550. Its totient is φ = 33115872.

The previous prime is 66231731. The next prime is 66231757. The reversal of 66231752 is 25713266.

It can be written as a sum of positive squares in only one way, i.e., 44009956 + 22221796 = 6634^2 + 4714^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (66231757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4139477 + ... + 4139492.

Almost surely, 2^66231752 is an apocalyptic number.

It is an amenable number.

66231752 is a deficient number, since it is larger than the sum of its proper divisors (57952798).

66231752 is a wasteful number, since it uses less digits than its factorization.

66231752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8278975 (or 8278971 counting only the distinct ones).

The product of its digits is 15120, while the sum is 32.

The square root of 66231752 is about 8138.2892551199. The cubic root of 66231752 is about 404.5964623521.

The spelling of 66231752 in words is "sixty-six million, two hundred thirty-one thousand, seven hundred fifty-two".