66549344 has 24 divisors (see below), whose sum is σ = 133494480. Its totient is φ = 32646016.

The previous prime is 66549341. The next prime is 66549359. The reversal of 66549344 is 44394566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66549341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17924 + ... + 21315.

It is an arithmetic number, because the mean of its divisors is an integer number (5562270).

Almost surely, 2^66549344 is an apocalyptic number.

It is an amenable number.

66549344 is an abundant number, since it is smaller than the sum of its proper divisors (66945136).

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

66549344 is a wasteful number, since it uses less digits than its factorization.

66549344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39302 (or 39294 counting only the distinct ones).

The product of its digits is 311040, while the sum is 41.

The square root of 66549344 is about 8157.7781288780. The cubic root of 66549344 is about 405.2421333173.

The spelling of 66549344 in words is "sixty-six million, five hundred forty-nine thousand, three hundred forty-four".