66983744 has 28 divisors (see below), whose sum is σ = 133221984. Its totient is φ = 33416064.

The previous prime is 66983731. The next prime is 66983753. The reversal of 66983744 is 44738966.

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, 36677 + ... + 38459.

It is an arithmetic number, because the mean of its divisors is an integer number (4757928).

Almost surely, 2^66983744 is an apocalyptic number.

66983744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66983744 is a deficient number, since it is larger than the sum of its proper divisors (66238240).

66983744 is a wasteful number, since it uses less digits than its factorization.

66983744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382 (or 2372 counting only the distinct ones).

The product of its digits is 870912, while the sum is 47.

The square root of 66983744 is about 8184.3597183897. The cubic root of 66983744 is about 406.1219593648.

The spelling of 66983744 in words is "sixty-six million, nine hundred eighty-three thousand, seven hundred forty-four".