166782302761 has 2 divisors, whose sum is σ = 166782302762. Its totient is φ = 166782302760.

The previous prime is 166782302749. The next prime is 166782302779. The reversal of 166782302761 is 167203287661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129197113600 + 37585189161 = 359440^2 + 193869^2 .

It is a cyclic number.

It is not a de Polignac number, because 166782302761 - 2⁹ = 166782302249 is a prime.

It is not a weakly prime, because it can be changed into another prime (166782302861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83391151380 + 83391151381.

It is an arithmetic number, because the mean of its divisors is an integer number (83391151381).

Almost surely, 2^166782302761 is an apocalyptic number.

It is an amenable number.

166782302761 is a deficient number, since it is larger than the sum of its proper divisors (1).

166782302761 is an equidigital number, since it uses as much as digits as its factorization.

166782302761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 166782302761 in words is "one hundred sixty-six billion, seven hundred eighty-two million, three hundred two thousand, seven hundred sixty-one".