66304340 has 24 divisors (see below), whose sum is σ = 140307552. Its totient is φ = 26318240.

The previous prime is 66304327. The next prime is 66304349. The reversal of 66304340 is 4340366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66304349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10034 + ... + 15273.

It is an arithmetic number, because the mean of its divisors is an integer number (5846148).

Almost surely, 2^66304340 is an apocalyptic number.

It is an amenable number.

66304340 is an abundant number, since it is smaller than the sum of its proper divisors (74003212).

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

66304340 is a wasteful number, since it uses less digits than its factorization.

66304340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25447 (or 25445 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 66304340 is about 8142.7476935000. The cubic root of 66304340 is about 404.7442168884.

The spelling of 66304340 in words is "sixty-six million, three hundred four thousand, three hundred forty".