66043652 has 6 divisors (see below), whose sum is σ = 115576398. Its totient is φ = 33021824.

The previous prime is 66043619. The next prime is 66043669. The reversal of 66043652 is 25634066.

It can be written as a sum of positive squares in only one way, i.e., 65545216 + 498436 = 8096^2 + 706^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 8255453 + ... + 8255460.

It is an arithmetic number, because the mean of its divisors is an integer number (19262733).

Almost surely, 2^66043652 is an apocalyptic number.

It is an amenable number.

66043652 is a deficient number, since it is larger than the sum of its proper divisors (49532746).

66043652 is a wasteful number, since it uses less digits than its factorization.

66043652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16510917 (or 16510915 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 66043652 is about 8126.7245554405. The cubic root of 66043652 is about 404.2130774824.

The spelling of 66043652 in words is "sixty-six million, forty-three thousand, six hundred fifty-two".