766272165121 has 2 divisors, whose sum is σ = 766272165122. Its totient is φ = 766272165120.

The previous prime is 766272165119. The next prime is 766272165133. The reversal of 766272165121 is 121561272667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 721650250000 + 44621915121 = 849500^2 + 211239^2 .

It is a cyclic number.

It is not a de Polignac number, because 766272165121 - 2¹ = 766272165119 is a prime.

Together with 766272165119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (766272163121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383136082560 + 383136082561.

It is an arithmetic number, because the mean of its divisors is an integer number (383136082561).

Almost surely, 2^766272165121 is an apocalyptic number.

It is an amenable number.

766272165121 is a deficient number, since it is larger than the sum of its proper divisors (1).

766272165121 is an equidigital number, since it uses as much as digits as its factorization.

766272165121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 46.

The spelling of 766272165121 in words is "seven hundred sixty-six billion, two hundred seventy-two million, one hundred sixty-five thousand, one hundred twenty-one".