66740073 has 16 divisors (see below), whose sum is σ = 90279360. Its totient is φ = 43851776.

The previous prime is 66740059. The next prime is 66740077. The reversal of 66740073 is 37004766.

It is a cyclic number.

It is not a de Polignac number, because 66740073 - 2⁴ = 66740057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66740077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82093 + ... + 82901.

It is an arithmetic number, because the mean of its divisors is an integer number (5642460).

Almost surely, 2^66740073 is an apocalyptic number.

It is an amenable number.

66740073 is a deficient number, since it is larger than the sum of its proper divisors (23539287).

66740073 is a wasteful number, since it uses less digits than its factorization.

66740073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176.

The product of its (nonzero) digits is 21168, while the sum is 33.

The square root of 66740073 is about 8169.4597740610. The cubic root of 66740073 is about 405.6289024975.

The spelling of 66740073 in words is "sixty-six million, seven hundred forty thousand, seventy-three".