1966804667 has 2 divisors, whose sum is σ = 1966804668. Its totient is φ = 1966804666.

The previous prime is 1966804661. The next prime is 1966804669. The reversal of 1966804667 is 7664086691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1966804667 - 2¹² = 1966800571 is a prime.

Together with 1966804669, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1966804661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983402333 + 983402334.

It is an arithmetic number, because the mean of its divisors is an integer number (983402334).

Almost surely, 2^1966804667 is an apocalyptic number.

1966804667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966804667 is an equidigital number, since it uses as much as digits as its factorization.

1966804667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The square root of 1966804667 is about 44348.6715359096. The cubic root of 1966804667 is about 1252.9115420330.

The spelling of 1966804667 in words is "one billion, nine hundred sixty-six million, eight hundred four thousand, six hundred sixty-seven".