766137917 has 2 divisors, whose sum is σ = 766137918. Its totient is φ = 766137916.

The previous prime is 766137887. The next prime is 766137919. The reversal of 766137917 is 719731667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399760036 + 366377881 = 19994^2 + 19141^2 .

It is an emirp because it is prime and its reverse (719731667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 766137917 - 2¹⁴ = 766121533 is a prime.

Together with 766137919, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766137919) 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, 383068958 + 383068959.

It is an arithmetic number, because the mean of its divisors is an integer number (383068959).

Almost surely, 2^766137917 is an apocalyptic number.

It is an amenable number.

766137917 is a deficient number, since it is larger than the sum of its proper divisors (1).

766137917 is an equidigital number, since it uses as much as digits as its factorization.

766137917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 333396, while the sum is 47.

The square root of 766137917 is about 27679.1964659381. The cubic root of 766137917 is about 915.0306725263.

The spelling of 766137917 in words is "seven hundred sixty-six million, one hundred thirty-seven thousand, nine hundred seventeen".