1661446 has 8 divisors (see below), whose sum is σ = 2502000. Its totient is φ = 827448.

The previous prime is 1661441. The next prime is 1661447. The reversal of 1661446 is 6441661.

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 (1661441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 946 + ... + 2053.

It is an arithmetic number, because the mean of its divisors is an integer number (312750).

2^1661446 is an apocalyptic number.

1661446 is a deficient number, since it is larger than the sum of its proper divisors (840554).

1661446 is a wasteful number, since it uses less digits than its factorization.

1661446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3278.

The product of its digits is 3456, while the sum is 28.

The square root of 1661446 is about 1288.9709073521. The cubic root of 1661446 is about 118.4391849696.

The spelling of 1661446 in words is "one million, six hundred sixty-one thousand, four hundred forty-six".