7665712123 has 2 divisors, whose sum is σ = 7665712124. Its totient is φ = 7665712122.

The previous prime is 7665712121. The next prime is 7665712169. The reversal of 7665712123 is 3212175667.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7665712123 - 2¹ = 7665712121 is a prime.

Together with 7665712121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7665712121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832856061 + 3832856062.

It is an arithmetic number, because the mean of its divisors is an integer number (3832856062).

Almost surely, 2^7665712123 is an apocalyptic number.

7665712123 is a deficient number, since it is larger than the sum of its proper divisors (1).

7665712123 is an equidigital number, since it uses as much as digits as its factorization.

7665712123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 7665712123 is about 87554.0525789640. The cubic root of 7665712123 is about 1971.7453952633.

The spelling of 7665712123 in words is "seven billion, six hundred sixty-five million, seven hundred twelve thousand, one hundred twenty-three".