66287056 has 20 divisors (see below), whose sum is σ = 140107104. Its totient is φ = 30130400.

The previous prime is 66287051. The next prime is 66287113. The reversal of 66287056 is 65078266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66287051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188140 + ... + 188491.

Almost surely, 2^66287056 is an apocalyptic number.

It is an amenable number.

66287056 is an abundant number, since it is smaller than the sum of its proper divisors (73820048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66287056 is a wasteful number, since it uses less digits than its factorization.

66287056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376650 (or 376644 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 66287056 is about 8141.6863118153. The cubic root of 66287056 is about 404.7090446961.

The spelling of 66287056 in words is "sixty-six million, two hundred eighty-seven thousand, fifty-six".