65666736 has 60 divisors (see below), whose sum is σ = 193456120. Its totient is φ = 20736000.

The previous prime is 65666681. The next prime is 65666737. The reversal of 65666736 is 63766656.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 65666691 and 65666700.

It is not an unprimeable number, because it can be changed into a prime (65666737) 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 11 ways as a sum of consecutive naturals, for example, 9265 + ... + 14736.

Almost surely, 2^65666736 is an apocalyptic number.

It is an amenable number.

65666736 is an abundant number, since it is smaller than the sum of its proper divisors (127789384).

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

65666736 is a wasteful number, since it uses less digits than its factorization.

65666736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24034 (or 24025 counting only the distinct ones).

The product of its digits is 816480, while the sum is 45.

The square root of 65666736 is about 8103.5014654160. The cubic root of 65666736 is about 403.4426520304.

The spelling of 65666736 in words is "sixty-five million, six hundred sixty-six thousand, seven hundred thirty-six".