66318056 has 64 divisors (see below), whose sum is σ = 150921600. Its totient is φ = 26687232.

The previous prime is 66318053. The next prime is 66318061. The reversal of 66318056 is 65081366.

It is not an unprimeable number, because it can be changed into a prime (66318053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166850 + ... + 167246.

It is an arithmetic number, because the mean of its divisors is an integer number (2358150).

Almost surely, 2^66318056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66318056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75460800).

66318056 is an abundant number, since it is smaller than the sum of its proper divisors (84603544).

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

66318056 is a wasteful number, since it uses less digits than its factorization.

66318056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 66318056 is about 8143.5898717949. The cubic root of 66318056 is about 404.7721240054.

The spelling of 66318056 in words is "sixty-six million, three hundred eighteen thousand, fifty-six".