766660079 has 2 divisors, whose sum is σ = 766660080. Its totient is φ = 766660078.

The previous prime is 766660073. The next prime is 766660109. The reversal of 766660079 is 970066667.

It is a weak prime.

It is an emirp because it is prime and its reverse (970066667) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766660079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766660073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383330039 + 383330040.

It is an arithmetic number, because the mean of its divisors is an integer number (383330040).

Almost surely, 2^766660079 is an apocalyptic number.

766660079 is a deficient number, since it is larger than the sum of its proper divisors (1).

766660079 is an equidigital number, since it uses as much as digits as its factorization.

766660079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 47.

The square root of 766660079 is about 27688.6272501906. The cubic root of 766660079 is about 915.2385053153.

The spelling of 766660079 in words is "seven hundred sixty-six million, six hundred sixty thousand, seventy-nine".