663372 has 18 divisors (see below), whose sum is σ = 1676948. Its totient is φ = 221112.

The previous prime is 663371. The next prime is 663407. The reversal of 663372 is 273366.

663372 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (663371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9178 + ... + 9249.

2⁶⁶³³⁷² is an apocalyptic number.

It is an amenable number.

663372 is an abundant number, since it is smaller than the sum of its proper divisors (1013576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663372 is a wasteful number, since it uses less digits than its factorization.

663372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18437 (or 18432 counting only the distinct ones).

The product of its digits is 4536, while the sum is 27.

The square root of 663372 is about 814.4765189986. The cubic root of 663372 is about 87.2139009346.

It can be divided in two parts, 663 and 372, that added together give a triangular number (1035 = T₄₅).

The spelling of 663372 in words is "six hundred sixty-three thousand, three hundred seventy-two".