66345344 has 48 divisors (see below), whose sum is σ = 143168220. Its totient is φ = 30610944.

The previous prime is 66345313. The next prime is 66345361. The reversal of 66345344 is 44354366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20099 + ... + 23165.

Almost surely, 2^66345344 is an apocalyptic number.

66345344 is a gapful number since it is divisible by the number (64) 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 66345344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71584110).

66345344 is an abundant number, since it is smaller than the sum of its proper divisors (76822876).

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

66345344 is a wasteful number, since it uses less digits than its factorization.

66345344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107 (or 3082 counting only the distinct ones).

The product of its digits is 103680, while the sum is 35.

The square root of 66345344 is about 8145.2651276677. The cubic root of 66345344 is about 404.8276338106.

The spelling of 66345344 in words is "sixty-six million, three hundred forty-five thousand, three hundred forty-four".