766950161 has 2 divisors, whose sum is σ = 766950162. Its totient is φ = 766950160.

The previous prime is 766950109. The next prime is 766950169. The reversal of 766950161 is 161059667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 463110400 + 303839761 = 21520^2 + 17431^2 .

It is an emirp because it is prime and its reverse (161059667) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766950161 is a prime.

It is not a weakly prime, because it can be changed into another prime (766950169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383475080 + 383475081.

It is an arithmetic number, because the mean of its divisors is an integer number (383475081).

Almost surely, 2^766950161 is an apocalyptic number.

It is an amenable number.

766950161 is a deficient number, since it is larger than the sum of its proper divisors (1).

766950161 is an equidigital number, since it uses as much as digits as its factorization.

766950161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 766950161 is about 27693.8650426408. The cubic root of 766950161 is about 915.3539240192.

The spelling of 766950161 in words is "seven hundred sixty-six million, nine hundred fifty thousand, one hundred sixty-one".