1378166 has 8 divisors (see below), whose sum is σ = 2072304. Its totient is φ = 687400.

The previous prime is 1378163. The next prime is 1378187. The reversal of 1378166 is 6618731.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911 + ... + 1893.

It is an arithmetic number, because the mean of its divisors is an integer number (259038).

2^1378166 is an apocalyptic number.

1378166 is a deficient number, since it is larger than the sum of its proper divisors (694138).

1378166 is an equidigital number, since it uses as much as digits as its factorization.

1378166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686.

The product of its digits is 6048, while the sum is 32.

The square root of 1378166 is about 1173.9531506836. The cubic root of 1378166 is about 111.2842860279.

The spelling of 1378166 in words is "one million, three hundred seventy-eight thousand, one hundred sixty-six".