1066650209 has 8 divisors (see below), whose sum is σ = 1090638528. Its totient is φ = 1042871760.

The previous prime is 1066650199. The next prime is 1066650257. The reversal of 1066650209 is 9020566601.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1066650209 is a prime.

It is a super-2 number, since 2×1066650209² = 2275485336719487362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066653209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42167 + ... + 62540.

It is an arithmetic number, because the mean of its divisors is an integer number (136329816).

Almost surely, 2^1066650209 is an apocalyptic number.

It is an amenable number.

1066650209 is a deficient number, since it is larger than the sum of its proper divisors (23988319).

1066650209 is a wasteful number, since it uses less digits than its factorization.

1066650209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104935.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 1066650209 is about 32659.6112806016. The cubic root of 1066650209 is about 1021.7406549705.

The spelling of 1066650209 in words is "one billion, sixty-six million, six hundred fifty thousand, two hundred nine".