66747067 has 4 divisors (see below), whose sum is σ = 69048720. Its totient is φ = 64445416.

The previous prime is 66747053. The next prime is 66747073. The reversal of 66747067 is 76074766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76074766 = 2 ⋅38037383.

It is a cyclic number.

It is not a de Polignac number, because 66747067 - 2¹⁵ = 66714299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66747017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1150783 + ... + 1150840.

It is an arithmetic number, because the mean of its divisors is an integer number (17262180).

Almost surely, 2^66747067 is an apocalyptic number.

66747067 is a deficient number, since it is larger than the sum of its proper divisors (2301653).

66747067 is a wasteful number, since it uses less digits than its factorization.

66747067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301652.

The product of its (nonzero) digits is 296352, while the sum is 43.

The square root of 66747067 is about 8169.8878205273. The cubic root of 66747067 is about 405.6430712436.

The spelling of 66747067 in words is "sixty-six million, seven hundred forty-seven thousand, sixty-seven".