66543360 has 288 divisors, whose sum is σ = 241747968. Its totient is φ = 15482880.

The previous prime is 66543349. The next prime is 66543397. The reversal of 66543360 is 6334566.

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 31 ways as a sum of consecutive naturals, for example, 1547499 + ... + 1547541.

Almost surely, 2^66543360 is an apocalyptic number.

66543360 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 66543360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120873984).

66543360 is an abundant number, since it is smaller than the sum of its proper divisors (175204608).

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

66543360 is a wasteful number, since it uses less digits than its factorization.

66543360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 33.

The square root of 66543360 is about 8157.4113541000. The cubic root of 66543360 is about 405.2299867332.

The spelling of 66543360 in words is "sixty-six million, five hundred forty-three thousand, three hundred sixty".