1663546 has 8 divisors (see below), whose sum is σ = 2500884. Its totient is φ = 829920.

The previous prime is 1663537. The next prime is 1663547. The reversal of 1663546 is 6453661.

It can be written as a sum of positive squares in 2 ways, for example, as 1661521 + 2025 = 1289^2 + 45^2 .

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 (1663547) 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, 976 + ... + 2068.

2^1663546 is an apocalyptic number.

1663546 is a deficient number, since it is larger than the sum of its proper divisors (837338).

1663546 is a wasteful number, since it uses less digits than its factorization.

1663546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856.

The product of its digits is 12960, while the sum is 31.

The square root of 1663546 is about 1289.7852534434. The cubic root of 1663546 is about 118.4890647271.

It can be divided in two parts, 1663 and 546, that added together give a square (2209 = 47²).

The spelling of 1663546 in words is "one million, six hundred sixty-three thousand, five hundred forty-six".