1066378 has 4 divisors (see below), whose sum is σ = 1599570. Its totient is φ = 533188.

The previous prime is 1066367. The next prime is 1066379. The reversal of 1066378 is 8736601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8736601 = 101 ⋅86501.

It can be written as a sum of positive squares in only one way, i.e., 558009 + 508369 = 747^2 + 713^2 .

It is a super-2 number, since 2×1066378² = 2274324077768, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1066379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266593 + ... + 266596.

2^1066378 is an apocalyptic number.

1066378 is a deficient number, since it is larger than the sum of its proper divisors (533192).

1066378 is an equidigital number, since it uses as much as digits as its factorization.

1066378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533191.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1066378 is about 1032.6557993833. The cubic root of 1066378 is about 102.1653731547.

It can be divided in two parts, 1066 and 378, that added together give a square (1444 = 38²).

The spelling of 1066378 in words is "one million, sixty-six thousand, three hundred seventy-eight".