766670077 has 2 divisors, whose sum is σ = 766670078. Its totient is φ = 766670076.

The previous prime is 766670057. The next prime is 766670089. The reversal of 766670077 is 770076667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 413756281 + 352913796 = 20341^2 + 18786^2 .

It is an emirp because it is prime and its reverse (770076667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 766670077 - 2⁷ = 766669949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766670057) 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, 383335038 + 383335039.

It is an arithmetic number, because the mean of its divisors is an integer number (383335039).

Almost surely, 2^766670077 is an apocalyptic number.

It is an amenable number.

766670077 is a deficient number, since it is larger than the sum of its proper divisors (1).

766670077 is an equidigital number, since it uses as much as digits as its factorization.

766670077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518616, while the sum is 46.

The square root of 766670077 is about 27688.8077930416. The cubic root of 766670077 is about 915.2424838341.

The spelling of 766670077 in words is "seven hundred sixty-six million, six hundred seventy thousand, seventy-seven".