66466800 has 180 divisors, whose sum is σ = 237367000. Its totient is φ = 17210880.

The previous prime is 66466793. The next prime is 66466801. The reversal of 66466800 is 866466.

66466800 is a `hidden beast` number, since 6 + 646 + 6 + 8 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66466801) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 132951 + ... + 133449.

Almost surely, 2^66466800 is an apocalyptic number.

66466800 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 66466800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118683500).

66466800 is an abundant number, since it is smaller than the sum of its proper divisors (170900200).

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

66466800 is a wasteful number, since it uses less digits than its factorization.

66466800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 66466800 is about 8152.7173384093. The cubic root of 66466800 is about 405.0745176098.

The spelling of 66466800 in words is "sixty-six million, four hundred sixty-six thousand, eight hundred".