66161752 has 8 divisors (see below), whose sum is σ = 124053300. Its totient is φ = 33080872.

The previous prime is 66161747. The next prime is 66161779. The reversal of 66161752 is 25716166.

It is a happy number.

66161752 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4135102 + ... + 4135117.

Almost surely, 2^66161752 is an apocalyptic number.

It is an amenable number.

66161752 is a deficient number, since it is larger than the sum of its proper divisors (57891548).

66161752 is a wasteful number, since it uses less digits than its factorization.

66161752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8270225 (or 8270221 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 66161752 is about 8133.9874600346. The cubic root of 66161752 is about 404.4538734625.

The spelling of 66161752 in words is "sixty-six million, one hundred sixty-one thousand, seven hundred fifty-two".