1966430717 has 2 divisors, whose sum is σ = 1966430718. Its totient is φ = 1966430716.

The previous prime is 1966430693. The next prime is 1966430723. The reversal of 1966430717 is 7170346691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1901483236 + 64947481 = 43606^2 + 8059^2 .

It is a cyclic number.

It is not a de Polignac number, because 1966430717 - 2¹⁰ = 1966429693 is a prime.

It is a super-2 number, since 2×1966430717² = 7733699529522268178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1966430777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983215358 + 983215359.

It is an arithmetic number, because the mean of its divisors is an integer number (983215359).

Almost surely, 2^1966430717 is an apocalyptic number.

It is an amenable number.

1966430717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966430717 is an equidigital number, since it uses as much as digits as its factorization.

1966430717 is an evil number, because the sum of its binary digits is even.

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

The square root of 1966430717 is about 44344.4553129250. The cubic root of 1966430717 is about 1252.8321313395.

The spelling of 1966430717 in words is "one billion, nine hundred sixty-six million, four hundred thirty thousand, seven hundred seventeen".