65660432272 has 10 divisors (see below), whose sum is σ = 127217087558. Its totient is φ = 32830216128.

The previous prime is 65660432263. The next prime is 65660432287. The reversal of 65660432272 is 27223406656.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 50947712656 + 14712719616 = 225716^2 + 121296^2 .

It is a super-2 number, since 2×65660432272² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2051888493 + ... + 2051888524.

Almost surely, 2^65660432272 is an apocalyptic number.

It is an amenable number.

65660432272 is a deficient number, since it is larger than the sum of its proper divisors (61556655286).

65660432272 is a wasteful number, since it uses less digits than its factorization.

65660432272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4103777025 (or 4103777019 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 65660432272 in words is "sixty-five billion, six hundred sixty million, four hundred thirty-two thousand, two hundred seventy-two".