66315260 has 72 divisors (see below), whose sum is σ = 155737680. Its totient is φ = 23696640.

The previous prime is 66315259. The next prime is 66315289. The reversal of 66315260 is 6251366.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 161936 + ... + 162344.

Almost surely, 2^66315260 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 66315260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77868840).

66315260 is an abundant number, since it is smaller than the sum of its proper divisors (89422420).

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

66315260 is a wasteful number, since it uses less digits than its factorization.

66315260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 66315260 is about 8143.4182012224. The cubic root of 66315260 is about 404.7664354653.

The spelling of 66315260 in words is "sixty-six million, three hundred fifteen thousand, two hundred sixty".