66532237 has 8 divisors (see below), whose sum is σ = 70529400. Its totient is φ = 62544384.

The previous prime is 66532201. The next prime is 66532241. The reversal of 66532237 is 73223566.

It can be written as a sum of positive squares in 4 ways, for example, as 44521 + 66487716 = 211^2 + 8154^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66532237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66532247) 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 7 ways as a sum of consecutive naturals, for example, 17089 + ... + 20617.

It is an arithmetic number, because the mean of its divisors is an integer number (8816175).

Almost surely, 2^66532237 is an apocalyptic number.

It is an amenable number.

66532237 is a deficient number, since it is larger than the sum of its proper divisors (3997163).

66532237 is a wasteful number, since it uses less digits than its factorization.

66532237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4655.

The product of its digits is 45360, while the sum is 34.

The square root of 66532237 is about 8156.7295529520. The cubic root of 66532237 is about 405.2074068479.

The spelling of 66532237 in words is "sixty-six million, five hundred thirty-two thousand, two hundred thirty-seven".