766280069 has 2 divisors, whose sum is σ = 766280070. Its totient is φ = 766280068.

The previous prime is 766280033. The next prime is 766280071. The reversal of 766280069 is 960082667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 740656225 + 25623844 = 27215^2 + 5062^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766280069 is a prime.

It is a super-2 number, since 2×766280069² = 1174370288293289522, which contains 22 as substring.

Together with 766280071, 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 (766280569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383140034 + 383140035.

It is an arithmetic number, because the mean of its divisors is an integer number (383140035).

Almost surely, 2^766280069 is an apocalyptic number.

It is an amenable number.

766280069 is a deficient number, since it is larger than the sum of its proper divisors (1).

766280069 is an equidigital number, since it uses as much as digits as its factorization.

766280069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 766280069 is about 27681.7641959468. The cubic root of 766280069 is about 915.0872617266.

The spelling of 766280069 in words is "seven hundred sixty-six million, two hundred eighty thousand, sixty-nine".