66266512 has 20 divisors (see below), whose sum is σ = 138268060. Its totient is φ = 30584448.

The previous prime is 66266507. The next prime is 66266513. The reversal of 66266512 is 21566266.

66266512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 36192256 + 30074256 = 6016^2 + 5484^2 .

It is a super-2 number, since 2×66266512² = 8782501225292288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66266513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159087 + ... + 159502.

It is an arithmetic number, because the mean of its divisors is an integer number (6913403).

Almost surely, 2^66266512 is an apocalyptic number.

It is an amenable number.

66266512 is an abundant number, since it is smaller than the sum of its proper divisors (72001548).

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

66266512 is a wasteful number, since it uses less digits than its factorization.

66266512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318610 (or 318604 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 66266512 is about 8140.4245589527. The cubic root of 66266512 is about 404.6672305914.

The spelling of 66266512 in words is "sixty-six million, two hundred sixty-six thousand, five hundred twelve".