65554002000 has 640 divisors, whose sum is σ = 250475397120. Its totient is φ = 16350681600.

The previous prime is 65554001969. The next prime is 65554002001. The reversal of 65554002000 is 20045556.

65554002000 is a `hidden beast` number, since 6 + 5 + 55 + 400 + 200 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65554002001) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 58373439 + ... + 58374561.

It is an arithmetic number, because the mean of its divisors is an integer number (391367808).

Almost surely, 2^65554002000 is an apocalyptic number.

65554002000 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 65554002000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125237698560).

65554002000 is an abundant number, since it is smaller than the sum of its proper divisors (184921395120).

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

65554002000 is a wasteful number, since it uses less digits than its factorization.

65554002000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225 (or 1203 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

Adding to 65554002000 its reverse (20045556), we get a palindrome (65574047556).

The spelling of 65554002000 in words is "sixty-five billion, five hundred fifty-four million, two thousand".