665414352000 has 1280 divisors, whose sum is σ = 2650054492800. Its totient is φ = 164975616000.

The previous prime is 665414351989. The next prime is 665414352067. The reversal of 665414352000 is 253414566.

665414352000 is a `hidden beast` number, since 6 + 6 + 5 + 414 + 35 + 200 + 0 = 666.

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 (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1502063779 + ... + 1502064221.

Almost surely, 2^665414352000 is an apocalyptic number.

665414352000 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 665414352000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1325027246400).

665414352000 is an abundant number, since it is smaller than the sum of its proper divisors (1984640140800).

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

665414352000 is a wasteful number, since it uses less digits than its factorization.

665414352000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 665414352000 its reverse (253414566), we get a palindrome (665667766566).

The spelling of 665414352000 in words is "six hundred sixty-five billion, four hundred fourteen million, three hundred fifty-two thousand".