66165056 has 14 divisors (see below), whose sum is σ = 131296410. Its totient is φ = 33082496.

The previous prime is 66165031. The next prime is 66165059. The reversal of 66165056 is 65056166.

It can be written as a sum of positive squares in only one way, i.e., 41165056 + 25000000 = 6416^2 + 5000^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66165059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 516851 + ... + 516978.

It is an arithmetic number, because the mean of its divisors is an integer number (9378315).

Almost surely, 2^66165056 is an apocalyptic number.

It is an amenable number.

66165056 is a deficient number, since it is larger than the sum of its proper divisors (65131354).

66165056 is a wasteful number, since it uses less digits than its factorization.

66165056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033841 (or 1033831 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 66165056 is about 8134.1905559189. The cubic root of 66165056 is about 404.4606059190.

The spelling of 66165056 in words is "sixty-six million, one hundred sixty-five thousand, fifty-six".