66230340 has 96 divisors (see below), whose sum is σ = 211147776. Its totient is φ = 15354240.

The previous prime is 66230309. The next prime is 66230341. The reversal of 66230340 is 4303266.

It is a self number, because there is not a number n which added to its sum of digits gives 66230340.

It is not an unprimeable number, because it can be changed into a prime (66230341) 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, 12999 + ... + 17361.

It is an arithmetic number, because the mean of its divisors is an integer number (2199456).

Almost surely, 2^66230340 is an apocalyptic number.

66230340 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 66230340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105573888).

66230340 is an abundant number, since it is smaller than the sum of its proper divisors (144917436).

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

66230340 is a wasteful number, since it uses less digits than its factorization.

66230340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4409 (or 4407 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 66230340 is about 8138.2025042389. The cubic root of 66230340 is about 404.5935871236.

The spelling of 66230340 in words is "sixty-six million, two hundred thirty thousand, three hundred forty".