66006736 has 10 divisors (see below), whose sum is σ = 127888082. Its totient is φ = 33003360.

The previous prime is 66006727. The next prime is 66006739. The reversal of 66006736 is 63760066.

It can be written as a sum of positive squares in only one way, i.e., 61779600 + 4227136 = 7860^2 + 2056^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66006739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2062695 + ... + 2062726.

Almost surely, 2^66006736 is an apocalyptic number.

It is an amenable number.

66006736 is a deficient number, since it is larger than the sum of its proper divisors (61881346).

66006736 is a wasteful number, since it uses less digits than its factorization.

66006736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4125429 (or 4125423 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 66006736 is about 8124.4529662002. The cubic root of 66006736 is about 404.1377499747.

The spelling of 66006736 in words is "sixty-six million, six thousand, seven hundred thirty-six".