66455616000 has 320 divisors, whose sum is σ = 232589934720. Its totient is φ = 16787865600.

The previous prime is 66455615999. The next prime is 66455616001. The reversal of 66455616000 is 61655466.

It is an interprime number because it is at equal distance from previous prime (66455615999) and next prime (66455616001).

It is a tau number, because it is divible by the number of its divisors (320).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66455616000.

It is not an unprimeable number, because it can be changed into a prime (66455616001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3638892 + ... + 3657108.

It is an arithmetic number, because the mean of its divisors is an integer number (726843546).

Almost surely, 2^66455616000 is an apocalyptic number.

66455616000 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 66455616000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116294967360).

66455616000 is an abundant number, since it is smaller than the sum of its proper divisors (166134318720).

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

66455616000 is a wasteful number, since it uses less digits than its factorization.

66455616000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18272 (or 18246 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 66455616000 in words is "sixty-six billion, four hundred fifty-five million, six hundred sixteen thousand".