66538344 has 32 divisors (see below), whose sum is σ = 166551840. Its totient is φ = 22152000.

The previous prime is 66538313. The next prime is 66538363. The reversal of 66538344 is 44383566.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30159 + ... + 32289.

It is an arithmetic number, because the mean of its divisors is an integer number (5204745).

Almost surely, 2^66538344 is an apocalyptic number.

It is an amenable number.

66538344 is an abundant number, since it is smaller than the sum of its proper divisors (100013496).

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

66538344 is a wasteful number, since it uses less digits than its factorization.

66538344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441 (or 3437 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The square root of 66538344 is about 8157.1038978304. The cubic root of 66538344 is about 405.2198044767.

The spelling of 66538344 in words is "sixty-six million, five hundred thirty-eight thousand, three hundred forty-four".