1663372 has 12 divisors (see below), whose sum is σ = 2989840. Its totient is φ = 809136.

The previous prime is 1663351. The next prime is 1663373. The reversal of 1663372 is 2733661.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1663372.

It is not an unprimeable number, because it can be changed into a prime (1663373) 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, 5472 + ... + 5767.

2^1663372 is an apocalyptic number.

It is an amenable number.

1663372 is a deficient number, since it is larger than the sum of its proper divisors (1326468).

1663372 is a wasteful number, since it uses less digits than its factorization.

1663372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11280 (or 11278 counting only the distinct ones).

The product of its digits is 4536, while the sum is 28.

The square root of 1663372 is about 1289.7177985901. The cubic root of 1663372 is about 118.4849334284.

The spelling of 1663372 in words is "one million, six hundred sixty-three thousand, three hundred seventy-two".