66550116 has 12 divisors (see below), whose sum is σ = 155283632. Its totient is φ = 22183368.

The previous prime is 66550069. The next prime is 66550117. The reversal of 66550116 is 61105566.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×66550116² = 8857835879226912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66550117) 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 3 ways as a sum of consecutive naturals, for example, 2772910 + ... + 2772933.

Almost surely, 2^66550116 is an apocalyptic number.

It is an amenable number.

66550116 is an abundant number, since it is smaller than the sum of its proper divisors (88733516).

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

66550116 is a wasteful number, since it uses less digits than its factorization.

66550116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5545850 (or 5545848 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 66550116 is about 8157.8254455461. The cubic root of 66550116 is about 405.2437003036.

It can be divided in two parts, 66550 and 116, that added together give a palindrome (66666).

The spelling of 66550116 in words is "sixty-six million, five hundred fifty thousand, one hundred sixteen".