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1666039 is a prime number
BaseRepresentation
bin110010110101111110111
310010122101011
412112233313
5411303124
655413051
720106154
oct6265767
93118334
101666039
11a387a1
12684187
1346442b
1431522b
1522d994
hex196bf7

1666039 has 2 divisors, whose sum is σ = 1666040. Its totient is φ = 1666038.

The previous prime is 1666037. The next prime is 1666043. The reversal of 1666039 is 9306661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1666039 - 21 = 1666037 is a prime.

Together with 1666037, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1666039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1666037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833019 + 833020.

It is an arithmetic number, because the mean of its divisors is an integer number (833020).

21666039 is an apocalyptic number.

1666039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666039 is an equidigital number, since it uses as much as digits as its factorization.

1666039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 1666039 is about 1290.7513315895. The cubic root of 1666039 is about 118.5482246585.

The spelling of 1666039 in words is "one million, six hundred sixty-six thousand, thirty-nine".