1966081267 has 2 divisors, whose sum is σ = 1966081268. Its totient is φ = 1966081266.

The previous prime is 1966081223. The next prime is 1966081283. The reversal of 1966081267 is 7621806691.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1966081267 is a prime.

It is not a weakly prime, because it can be changed into another prime (1966081207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983040633 + 983040634.

It is an arithmetic number, because the mean of its divisors is an integer number (983040634).

Almost surely, 2^1966081267 is an apocalyptic number.

1966081267 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966081267 is an equidigital number, since it uses as much as digits as its factorization.

1966081267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1966081267 is about 44340.5149609248. The cubic root of 1966081267 is about 1252.7579142786.

The spelling of 1966081267 in words is "one billion, nine hundred sixty-six million, eighty-one thousand, two hundred sixty-seven".