66300840 has 96 divisors (see below), whose sum is σ = 220540320. Its totient is φ = 17265024.

The previous prime is 66300821. The next prime is 66300841. The reversal of 66300840 is 4800366.

It is not an unprimeable number, because it can be changed into a prime (66300841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13339 + ... + 17621.

It is an arithmetic number, because the mean of its divisors is an integer number (2297295).

Almost surely, 2^66300840 is an apocalyptic number.

66300840 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 66300840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110270160).

66300840 is an abundant number, since it is smaller than the sum of its proper divisors (154239480).

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

66300840 is a wasteful number, since it uses less digits than its factorization.

66300840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4343 (or 4336 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 66300840 is about 8142.5327754944. The cubic root of 66300840 is about 404.7370950334.

The spelling of 66300840 in words is "sixty-six million, three hundred thousand, eight hundred forty".