66277712 has 20 divisors (see below), whose sum is σ = 128545716. Its totient is φ = 33104640.

The previous prime is 66277711. The next prime is 66277753. The reversal of 66277712 is 21777266.

66277712 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 38987536 + 27290176 = 6244^2 + 5224^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66277711) 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, 22298 + ... + 25094.

Almost surely, 2^66277712 is an apocalyptic number.

It is an amenable number.

66277712 is a deficient number, since it is larger than the sum of its proper divisors (62268004).

66277712 is a wasteful number, since it uses less digits than its factorization.

66277712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286 (or 4280 counting only the distinct ones).

The product of its digits is 49392, while the sum is 38.

The square root of 66277712 is about 8141.1124546956. The cubic root of 66277712 is about 404.6900275141.

The spelling of 66277712 in words is "sixty-six million, two hundred seventy-seven thousand, seven hundred twelve".