66001652 has 6 divisors (see below), whose sum is σ = 115502898. Its totient is φ = 33000824.

The previous prime is 66001631. The next prime is 66001657. The reversal of 66001652 is 25610066.

It can be written as a sum of positive squares in only one way, i.e., 55413136 + 10588516 = 7444^2 + 3254^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66001657) 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 as a sum of consecutive naturals, namely, 8250203 + ... + 8250210.

It is an arithmetic number, because the mean of its divisors is an integer number (19250483).

Almost surely, 2^66001652 is an apocalyptic number.

It is an amenable number.

66001652 is a deficient number, since it is larger than the sum of its proper divisors (49501246).

66001652 is a wasteful number, since it uses less digits than its factorization.

66001652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16500417 (or 16500415 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 66001652 is about 8124.1400775713. The cubic root of 66001652 is about 404.1273738162.

The spelling of 66001652 in words is "sixty-six million, one thousand, six hundred fifty-two".