1066646165 has 8 divisors (see below), whose sum is σ = 1378435128. Its totient is φ = 787677120.

The previous prime is 1066646159. The next prime is 1066646167. The reversal of 1066646165 is 5616466601.

It can be written as a sum of positive squares in 4 ways, for example, as 19864849 + 1046781316 = 4457^2 + 32354^2 .

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

It is not a de Polignac number, because 1066646165 - 2²⁸ = 798210709 is a prime.

It is a super-2 number, since 2×1066646165² = 2275468082618414450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066646167) 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 in 7 ways as a sum of consecutive naturals, for example, 8204906 + ... + 8205035.

It is an arithmetic number, because the mean of its divisors is an integer number (172304391).

Almost surely, 2^1066646165 is an apocalyptic number.

It is an amenable number.

1066646165 is a deficient number, since it is larger than the sum of its proper divisors (311788963).

1066646165 is a wasteful number, since it uses less digits than its factorization.

1066646165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16409959.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 1066646165 is about 32659.5493692121. The cubic root of 1066646165 is about 1021.7393637242.

The spelling of 1066646165 in words is "one billion, sixty-six million, six hundred forty-six thousand, one hundred sixty-five".