66430260 has 96 divisors (see below), whose sum is σ = 222593280. Its totient is φ = 16350336.

The previous prime is 66430249. The next prime is 66430261. The reversal of 66430260 is 6203466.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66430261) 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, 2289 + ... + 11751.

It is an arithmetic number, because the mean of its divisors is an integer number (2318680).

Almost surely, 2^66430260 is an apocalyptic number.

66430260 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 66430260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111296640).

66430260 is an abundant number, since it is smaller than the sum of its proper divisors (156163020).

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

66430260 is a wasteful number, since it uses less digits than its factorization.

66430260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9494 (or 9486 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 66430260 is about 8150.4760597158. The cubic root of 66430260 is about 405.0002743482. Note that the first 3 decimals are identical.

The spelling of 66430260 in words is "sixty-six million, four hundred thirty thousand, two hundred sixty".