66543016 has 32 divisors (see below), whose sum is σ = 134402400. Its totient is φ = 30784320.

The previous prime is 66543011. The next prime is 66543017. The reversal of 66543016 is 61034566.

It is not an unprimeable number, because it can be changed into a prime (66543011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1446 + ... + 11626.

It is an arithmetic number, because the mean of its divisors is an integer number (4200075).

Almost surely, 2^66543016 is an apocalyptic number.

It is an amenable number.

66543016 is an abundant number, since it is smaller than the sum of its proper divisors (67859384).

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

66543016 is a wasteful number, since it uses less digits than its factorization.

66543016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10249 (or 10245 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 66543016 is about 8157.3902689524. The cubic root of 66543016 is about 405.2292884449.

It can be divided in two parts, 665 and 43016, that added together give a square (43681 = 209²).

The spelling of 66543016 in words is "sixty-six million, five hundred forty-three thousand, sixteen".