66738844 has 12 divisors (see below), whose sum is σ = 117304600. Its totient is φ = 33223248.

The previous prime is 66738827. The next prime is 66738869. The reversal of 66738844 is 44883766.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66738794 and 66738803.

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, 35514 + ... + 37345.

Almost surely, 2^66738844 is an apocalyptic number.

It is an amenable number.

66738844 is a deficient number, since it is larger than the sum of its proper divisors (50565756).

66738844 is a wasteful number, since it uses less digits than its factorization.

66738844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73092 (or 73090 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

The square root of 66738844 is about 8169.3845545426. The cubic root of 66738844 is about 405.6264126342.

The spelling of 66738844 in words is "sixty-six million, seven hundred thirty-eight thousand, eight hundred forty-four".