663673500 has 240 divisors, whose sum is σ = 2475625152. Its totient is φ = 151632000.

The previous prime is 663673471. The next prime is 663673541. The reversal of 663673500 is 5376366.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 282330 + ... + 284670.

Almost surely, 2^663673500 is an apocalyptic number.

663673500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663673500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1237812576).

663673500 is an abundant number, since it is smaller than the sum of its proper divisors (1811951652).

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

663673500 is a wasteful number, since it uses less digits than its factorization.

663673500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379 (or 2358 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 36.

The square root of 663673500 is about 25761.8613457956. The cubic root of 663673500 is about 872.2711172654.

The spelling of 663673500 in words is "six hundred sixty-three million, six hundred seventy-three thousand, five hundred".