1966966871 has 2 divisors, whose sum is σ = 1966966872. Its totient is φ = 1966966870.

The previous prime is 1966966867. The next prime is 1966966901. The reversal of 1966966871 is 1786696691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1966966871 - 2² = 1966966867 is a prime.

It is a super-2 number, since 2×1966966871² = 7737917343223061282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1966966871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1966966801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983483435 + 983483436.

It is an arithmetic number, because the mean of its divisors is an integer number (983483436).

Almost surely, 2^1966966871 is an apocalyptic number.

1966966871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966966871 is an equidigital number, since it uses as much as digits as its factorization.

1966966871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 59.

The square root of 1966966871 is about 44350.5002339320. The cubic root of 1966966871 is about 1252.9459839683.

The spelling of 1966966871 in words is "one billion, nine hundred sixty-six million, nine hundred sixty-six thousand, eight hundred seventy-one".