65671220100650 has 12 divisors (see below), whose sum is σ = 122148469387302. Its totient is φ = 26268488040240.

The previous prime is 65671220100631. The next prime is 65671220100697. The reversal of 65671220100650 is 5600102217656.

It can be written as a sum of positive squares in 3 ways, for example, as 63667265597329 + 2003954503321 = 7979177^2 + 1415611^2 .

It is a super-2 number, since 2×65671220100650² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65671220100598 and 65671220100607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 656712200957 + ... + 656712201056.

Almost surely, 2^{65671220100650} is an apocalyptic number.

65671220100650 is a deficient number, since it is larger than the sum of its proper divisors (56477249286652).

65671220100650 is a wasteful number, since it uses less digits than its factorization.

65671220100650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313424402025 (or 1313424402020 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 65671220100650 in words is "sixty-five trillion, six hundred seventy-one billion, two hundred twenty million, one hundred thousand, six hundred fifty".