66348240 has 160 divisors (see below), whose sum is σ = 238722816. Its totient is φ = 14929920.

The previous prime is 66348203. The next prime is 66348253. The reversal of 66348240 is 4284366.

66348240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 122370 + ... + 122910.

Almost surely, 2^66348240 is an apocalyptic number.

66348240 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 66348240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119361408).

66348240 is an abundant number, since it is smaller than the sum of its proper divisors (172374576).

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

66348240 is a wasteful number, since it uses less digits than its factorization.

66348240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 66348240 is about 8145.4428977189. The cubic root of 66348240 is about 404.8335240193.

The spelling of 66348240 in words is "sixty-six million, three hundred forty-eight thousand, two hundred forty".