1766340791 has 2 divisors, whose sum is σ = 1766340792. Its totient is φ = 1766340790.

The previous prime is 1766340773. The next prime is 1766340811. The reversal of 1766340791 is 1970436671.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1766340791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1766340731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 883170395 + 883170396.

It is an arithmetic number, because the mean of its divisors is an integer number (883170396).

Almost surely, 2^1766340791 is an apocalyptic number.

1766340791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1766340791 is an equidigital number, since it uses as much as digits as its factorization.

1766340791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 1766340791 is about 42027.8573210674. The cubic root of 1766340791 is about 1208.8103397253.

The spelling of 1766340791 in words is "one billion, seven hundred sixty-six million, three hundred forty thousand, seven hundred ninety-one".