7665123126671 has 2 divisors, whose sum is σ = 7665123126672. Its totient is φ = 7665123126670.

The previous prime is 7665123126643. The next prime is 7665123126709. The reversal of 7665123126671 is 1766213215667.

It is a weak prime.

It is an emirp because it is prime and its reverse (1766213215667) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7665123126671 is a prime.

It is a super-2 number, since 2×7665123126671² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7665123156671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832561563335 + 3832561563336.

It is an arithmetic number, because the mean of its divisors is an integer number (3832561563336).

Almost surely, 2^{7665123126671} is an apocalyptic number.

7665123126671 is a deficient number, since it is larger than the sum of its proper divisors (1).

7665123126671 is an equidigital number, since it uses as much as digits as its factorization.

7665123126671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 53.

The spelling of 7665123126671 in words is "seven trillion, six hundred sixty-five billion, one hundred twenty-three million, one hundred twenty-six thousand, six hundred seventy-one".