1066639967 has 2 divisors, whose sum is σ = 1066639968. Its totient is φ = 1066639966.

The previous prime is 1066639963. The next prime is 1066640009. The reversal of 1066639967 is 7699366601.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1066639967 - 2² = 1066639963 is a prime.

It is a super-2 number, since 2×1066639967² = 2275441638403522178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066639963) 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, 533319983 + 533319984.

It is an arithmetic number, because the mean of its divisors is an integer number (533319984).

Almost surely, 2^1066639967 is an apocalyptic number.

1066639967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066639967 is an equidigital number, since it uses as much as digits as its factorization.

1066639967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2204496, while the sum is 53.

The square root of 1066639967 is about 32659.4544810534. The cubic root of 1066639967 is about 1021.7373847009.

The spelling of 1066639967 in words is "one billion, sixty-six million, six hundred thirty-nine thousand, nine hundred sixty-seven".