66875272 has 16 divisors (see below), whose sum is σ = 126043740. Its totient is φ = 33263616.

The previous prime is 66875251. The next prime is 66875287. The reversal of 66875272 is 27257866.

It can be written as a sum of positive squares in 2 ways, for example, as 63584676 + 3290596 = 7974^2 + 1814^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20113 + ... + 23200.

Almost surely, 2^66875272 is an apocalyptic number.

It is an amenable number.

66875272 is a deficient number, since it is larger than the sum of its proper divisors (59168468).

66875272 is a wasteful number, since it uses less digits than its factorization.

66875272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43512 (or 43508 counting only the distinct ones).

The product of its digits is 282240, while the sum is 43.

The square root of 66875272 is about 8177.7302474464. The cubic root of 66875272 is about 405.9026192713.

The spelling of 66875272 in words is "sixty-six million, eight hundred seventy-five thousand, two hundred seventy-two".