66334340 has 48 divisors (see below), whose sum is σ = 151511472. Its totient is φ = 24293376.

The previous prime is 66334319. The next prime is 66334361. The reversal of 66334340 is 4343366.

66334340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66334319) and next prime (66334361).

It can be written as a sum of positive squares in 8 ways, for example, as 5837056 + 60497284 = 2416^2 + 7778^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9944 + ... + 15216.

It is an arithmetic number, because the mean of its divisors is an integer number (3156489).

Almost surely, 2^66334340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66334340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75755736).

66334340 is an abundant number, since it is smaller than the sum of its proper divisors (85177132).

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

66334340 is a wasteful number, since it uses less digits than its factorization.

66334340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5336 (or 5334 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 29.

The square root of 66334340 is about 8144.5896151985. The cubic root of 66334340 is about 404.8052510815.

The spelling of 66334340 in words is "sixty-six million, three hundred thirty-four thousand, three hundred forty".