66320514 has 48 divisors (see below), whose sum is σ = 155937600. Its totient is φ = 20249568.

The previous prime is 66320509. The next prime is 66320533. The reversal of 66320514 is 41502366.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31507 + ... + 33545.

It is an arithmetic number, because the mean of its divisors is an integer number (3248700).

Almost surely, 2^66320514 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66320514, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77968800).

66320514 is an abundant number, since it is smaller than the sum of its proper divisors (89617086).

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

66320514 is a wasteful number, since it uses less digits than its factorization.

66320514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199 (or 2196 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 66320514 is about 8143.7407866410. The cubic root of 66320514 is about 404.7771247430. Note that the first 3 decimals are identical.

The spelling of 66320514 in words is "sixty-six million, three hundred twenty thousand, five hundred fourteen".