66740444 has 6 divisors (see below), whose sum is σ = 116795784. Its totient is φ = 33370220.

The previous prime is 66740437. The next prime is 66740519. The reversal of 66740444 is 44404766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8342552 + ... + 8342559.

It is an arithmetic number, because the mean of its divisors is an integer number (19465964).

Almost surely, 2^66740444 is an apocalyptic number.

It is an amenable number.

66740444 is a deficient number, since it is larger than the sum of its proper divisors (50055340).

66740444 is a wasteful number, since it uses less digits than its factorization.

66740444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16685115 (or 16685113 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 35.

The square root of 66740444 is about 8169.4824805492. The cubic root of 66740444 is about 405.6296541101.

The spelling of 66740444 in words is "sixty-six million, seven hundred forty thousand, four hundred forty-four".