775166655371 has 2 divisors, whose sum is σ = 775166655372. Its totient is φ = 775166655370.

The previous prime is 775166655331. The next prime is 775166655379. The reversal of 775166655371 is 173556661577.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-775166655371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 775166655371.

It is not a weakly prime, because it can be changed into another prime (775166655379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387583327685 + 387583327686.

It is an arithmetic number, because the mean of its divisors is an integer number (387583327686).

Almost surely, 2^775166655371 is an apocalyptic number.

775166655371 is a deficient number, since it is larger than the sum of its proper divisors (1).

775166655371 is an equidigital number, since it uses as much as digits as its factorization.

775166655371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27783000, while the sum is 59.

The spelling of 775166655371 in words is "seven hundred seventy-five billion, one hundred sixty-six million, six hundred fifty-five thousand, three hundred seventy-one".