66515056 has 10 divisors (see below), whose sum is σ = 128872952. Its totient is φ = 33257520.

The previous prime is 66515051. The next prime is 66515063. The reversal of 66515056 is 65051566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66515051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2078580 + ... + 2078611.

Almost surely, 2^66515056 is an apocalyptic number.

It is an amenable number.

66515056 is a deficient number, since it is larger than the sum of its proper divisors (62357896).

66515056 is a wasteful number, since it uses less digits than its factorization.

66515056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4157199 (or 4157193 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 66515056 is about 8155.6763054942. The cubic root of 66515056 is about 405.1725241699.

The spelling of 66515056 in words is "sixty-six million, five hundred fifteen thousand, fifty-six".