66343744 has 28 divisors (see below), whose sum is σ = 138582400. Its totient is φ = 31425408.

The previous prime is 66343709. The next prime is 66343759. The reversal of 66343744 is 44734366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26064 + ... + 28495.

Almost surely, 2^66343744 is an apocalyptic number.

66343744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66343744 is an abundant number, since it is smaller than the sum of its proper divisors (72238656).

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

66343744 is a wasteful number, since it uses less digits than its factorization.

66343744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54590 (or 54580 counting only the distinct ones).

The product of its digits is 145152, while the sum is 37.

The square root of 66343744 is about 8145.1669105059. The cubic root of 66343744 is about 404.8243794781.

The spelling of 66343744 in words is "sixty-six million, three hundred forty-three thousand, seven hundred forty-four".