1663346 has 8 divisors (see below), whose sum is σ = 2500524. Its totient is φ = 829840.

The previous prime is 1663327. The next prime is 1663349. The reversal of 1663346 is 6433661.

It can be written as a sum of positive squares in 2 ways, for example, as 1297321 + 366025 = 1139^2 + 605^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1663349) 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, 1136 + ... + 2148.

2^1663346 is an apocalyptic number.

1663346 is a deficient number, since it is larger than the sum of its proper divisors (837178).

1663346 is a wasteful number, since it uses less digits than its factorization.

1663346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836.

The product of its digits is 7776, while the sum is 29.

The square root of 1663346 is about 1289.7077188262. The cubic root of 1663346 is about 118.4843160832.

The spelling of 1663346 in words is "one million, six hundred sixty-three thousand, three hundred forty-six".