66408056 has 32 divisors (see below), whose sum is σ = 146286000. Its totient is φ = 27863040.

The previous prime is 66408053. The next prime is 66408071. The reversal of 66408056 is 65080466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66408053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27881 + ... + 30168.

Almost surely, 2^66408056 is an apocalyptic number.

It is an amenable number.

66408056 is an abundant number, since it is smaller than the sum of its proper divisors (79877944).

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

66408056 is a wasteful number, since it uses less digits than its factorization.

66408056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58079 (or 58075 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 66408056 is about 8149.1138168515. The cubic root of 66408056 is about 404.9551461783.

The spelling of 66408056 in words is "sixty-six million, four hundred eight thousand, fifty-six".