1665007 has 2 divisors, whose sum is σ = 1665008. Its totient is φ = 1665006.

The previous prime is 1664987. The next prime is 1665023. The reversal of 1665007 is 7005661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1665007 - 2¹¹ = 1662959 is a prime.

1665007 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1665067) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832503 + 832504.

It is an arithmetic number, because the mean of its divisors is an integer number (832504).

2^1665007 is an apocalyptic number.

1665007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1665007 is an equidigital number, since it uses as much as digits as its factorization.

1665007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 1665007 is about 1290.3515024984. The cubic root of 1665007 is about 118.5237420308.

The spelling of 1665007 in words is "one million, six hundred sixty-five thousand, seven".