66650216 has 16 divisors (see below), whose sum is σ = 125103840. Its totient is φ = 33289200.

The previous prime is 66650197. The next prime is 66650219. The reversal of 66650216 is 61205666.

It is not an unprimeable number, because it can be changed into a prime (66650219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4445 + ... + 12371.

It is an arithmetic number, because the mean of its divisors is an integer number (7818990).

Almost surely, 2^66650216 is an apocalyptic number.

It is an amenable number.

66650216 is a deficient number, since it is larger than the sum of its proper divisors (58453624).

66650216 is a wasteful number, since it uses less digits than its factorization.

66650216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8984 (or 8980 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 66650216 is about 8163.9583536419. The cubic root of 66650216 is about 405.4467782020.

It can be divided in two parts, 66650 and 216, that added together give a palindrome (66866).

The spelling of 66650216 in words is "sixty-six million, six hundred fifty thousand, two hundred sixteen".