1966208087 has 2 divisors, whose sum is σ = 1966208088. Its totient is φ = 1966208086.

The previous prime is 1966208081. The next prime is 1966208089. The reversal of 1966208087 is 7808026691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1966208087 - 2⁴ = 1966208071 is a prime.

Together with 1966208089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1966208081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983104043 + 983104044.

It is an arithmetic number, because the mean of its divisors is an integer number (983104044).

Almost surely, 2^1966208087 is an apocalyptic number.

1966208087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966208087 is an equidigital number, since it uses as much as digits as its factorization.

1966208087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 1966208087 is about 44341.9450069570. The cubic root of 1966208087 is about 1252.7848496425.

The spelling of 1966208087 in words is "one billion, nine hundred sixty-six million, two hundred eight thousand, eighty-seven".