66740733 has 16 divisors (see below), whose sum is σ = 103175040. Its totient is φ = 42558912.

The previous prime is 66740719. The next prime is 66740747. The reversal of 66740733 is 33704766.

It is an interprime number because it is at equal distance from previous prime (66740719) and next prime (66740747).

It is not a de Polignac number, because 66740733 - 2⁴ = 66740717 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66740633) 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, 53116 + ... + 54357.

It is an arithmetic number, because the mean of its divisors is an integer number (6448440).

Almost surely, 2^66740733 is an apocalyptic number.

It is an amenable number.

66740733 is a deficient number, since it is larger than the sum of its proper divisors (36434307).

66740733 is a wasteful number, since it uses less digits than its factorization.

66740733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107505 (or 107499 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 36.

The square root of 66740733 is about 8169.5001683090. The cubic root of 66740733 is about 405.6302395962.

The spelling of 66740733 in words is "sixty-six million, seven hundred forty thousand, seven hundred thirty-three".