766012549 has 2 divisors, whose sum is σ = 766012550. Its totient is φ = 766012548.

The previous prime is 766012547. The next prime is 766012601. The reversal of 766012549 is 945210667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 544895649 + 221116900 = 23343^2 + 14870^2 .

It is an emirp because it is prime and its reverse (945210667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 766012549 - 2¹ = 766012547 is a prime.

Together with 766012547, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766012547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383006274 + 383006275.

It is an arithmetic number, because the mean of its divisors is an integer number (383006275).

Almost surely, 2^766012549 is an apocalyptic number.

It is an amenable number.

766012549 is a deficient number, since it is larger than the sum of its proper divisors (1).

766012549 is an equidigital number, since it uses as much as digits as its factorization.

766012549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 766012549 is about 27676.9317121678. The cubic root of 766012549 is about 914.9807590487.

The spelling of 766012549 in words is "seven hundred sixty-six million, twelve thousand, five hundred forty-nine".