66516882 has 16 divisors (see below), whose sum is σ = 133462560. Its totient is φ = 22100832.

The previous prime is 66516839. The next prime is 66516889. The reversal of 66516882 is 28861566.

It is not an unprimeable number, because it can be changed into a prime (66516889) 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, 15832 + ... + 19587.

It is an arithmetic number, because the mean of its divisors is an integer number (8341410).

Almost surely, 2^66516882 is an apocalyptic number.

66516882 is an abundant number, since it is smaller than the sum of its proper divisors (66945678).

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

66516882 is a wasteful number, since it uses less digits than its factorization.

66516882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35737.

The product of its digits is 138240, while the sum is 42.

The square root of 66516882 is about 8155.7882512974. The cubic root of 66516882 is about 405.1762317929.

The spelling of 66516882 in words is "sixty-six million, five hundred sixteen thousand, eight hundred eighty-two".