65006551621243 has 2 divisors, whose sum is σ = 65006551621244. Its totient is φ = 65006551621242.

The previous prime is 65006551621169. The next prime is 65006551621339. The reversal of 65006551621243 is 34212615560056.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65006551621243 - 2¹³ = 65006551613051 is a prime.

It is a super-3 number, since 3×65006551621243³ (a number of 42 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65006551621193 and 65006551621202.

It is not a weakly prime, because it can be changed into another prime (65006551624243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32503275810621 + 32503275810622.

It is an arithmetic number, because the mean of its divisors is an integer number (32503275810622).

Almost surely, 2^{65006551621243} is an apocalyptic number.

65006551621243 is a deficient number, since it is larger than the sum of its proper divisors (1).

65006551621243 is an equidigital number, since it uses as much as digits as its factorization.

65006551621243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 65006551621243 in words is "sixty-five trillion, six billion, five hundred fifty-one million, six hundred twenty-one thousand, two hundred forty-three".