766540771 has 2 divisors, whose sum is σ = 766540772. Its totient is φ = 766540770.

The previous prime is 766540759. The next prime is 766540777. The reversal of 766540771 is 177045667.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 766540771 - 2⁵ = 766540739 is a prime.

It is not a weakly prime, because it can be changed into another prime (766540777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383270385 + 383270386.

It is an arithmetic number, because the mean of its divisors is an integer number (383270386).

Almost surely, 2^766540771 is an apocalyptic number.

766540771 is a deficient number, since it is larger than the sum of its proper divisors (1).

766540771 is an equidigital number, since it uses as much as digits as its factorization.

766540771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 766540771 is about 27686.4727078044. The cubic root of 766540771 is about 915.1910262375.

The spelling of 766540771 in words is "seven hundred sixty-six million, five hundred forty thousand, seven hundred seventy-one".