66544496 has 20 divisors (see below), whose sum is σ = 129439632. Its totient is φ = 33140736.

The previous prime is 66544493. The next prime is 66544501. The reversal of 66544496 is 69444566.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66544493) 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, 3980 + ... + 12203.

Almost surely, 2^66544496 is an apocalyptic number.

It is an amenable number.

66544496 is a deficient number, since it is larger than the sum of its proper divisors (62895136).

66544496 is a wasteful number, since it uses less digits than its factorization.

66544496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16448 (or 16442 counting only the distinct ones).

The product of its digits is 622080, while the sum is 44.

The square root of 66544496 is about 8157.4809837351. The cubic root of 66544496 is about 405.2322926915.

The spelling of 66544496 in words is "sixty-six million, five hundred forty-four thousand, four hundred ninety-six".