663624998400 has 1440 divisors, whose sum is σ = 2828413969920. Its totient is φ = 133556797440.

The previous prime is 663624998381. The next prime is 663624998437. The reversal of 663624998400 is 4899426366.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1848537421 + ... + 1848537779.

It is an arithmetic number, because the mean of its divisors is an integer number (1964176368).

Almost surely, 2^663624998400 is an apocalyptic number.

663624998400 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 663624998400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1414206984960).

663624998400 is an abundant number, since it is smaller than the sum of its proper divisors (2164788971520).

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

663624998400 is a wasteful number, since it uses less digits than its factorization.

663624998400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 412 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 57.

The spelling of 663624998400 in words is "six hundred sixty-three billion, six hundred twenty-four million, nine hundred ninety-eight thousand, four hundred".