766066687 has 2 divisors, whose sum is σ = 766066688. Its totient is φ = 766066686.

The previous prime is 766066657. The next prime is 766066729. The reversal of 766066687 is 786660667.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 766066687 - 2¹⁹ = 765542399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766066627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383033343 + 383033344.

It is an arithmetic number, because the mean of its divisors is an integer number (383033344).

Almost surely, 2^766066687 is an apocalyptic number.

766066687 is a deficient number, since it is larger than the sum of its proper divisors (1).

766066687 is an equidigital number, since it uses as much as digits as its factorization.

766066687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 52.

The square root of 766066687 is about 27677.9097296021. The cubic root of 766066687 is about 915.0023139878.

It can be divided in two parts, 7660 and 66687, that added together give a palindrome (74347).

The spelling of 766066687 in words is "seven hundred sixty-six million, sixty-six thousand, six hundred eighty-seven".