66747064 has 8 divisors (see below), whose sum is σ = 125150760. Its totient is φ = 33373528.

The previous prime is 66747053. The next prime is 66747073. The reversal of 66747064 is 46074766.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4171684 + ... + 4171699.

It is an arithmetic number, because the mean of its divisors is an integer number (15643845).

Almost surely, 2^66747064 is an apocalyptic number.

It is an amenable number.

66747064 is a deficient number, since it is larger than the sum of its proper divisors (58403696).

66747064 is a wasteful number, since it uses less digits than its factorization.

66747064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8343389 (or 8343385 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 66747064 is about 8169.8876369262. The cubic root of 66747064 is about 405.6430651663.

The spelling of 66747064 in words is "sixty-six million, seven hundred forty-seven thousand, sixty-four".