663418 has 8 divisors (see below), whose sum is σ = 1137312. Its totient is φ = 284316.

The previous prime is 663409. The next prime is 663437. The reversal of 663418 is 814366.

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

It is a nialpdrome in base 7.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23680 + ... + 23707.

It is an arithmetic number, because the mean of its divisors is an integer number (142164).

2⁶⁶³⁴¹⁸ is an apocalyptic number.

663418 is a deficient number, since it is larger than the sum of its proper divisors (473894).

663418 is a wasteful number, since it uses less digits than its factorization.

663418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47396.

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

The square root of 663418 is about 814.5047575061. The cubic root of 663418 is about 87.2159167702.

It can be divided in two parts, 663 and 418, that added together give a triangular number (1081 = T₄₆).

The spelling of 663418 in words is "six hundred sixty-three thousand, four hundred eighteen".