66743045 has 4 divisors (see below), whose sum is σ = 80091660. Its totient is φ = 53394432.

The previous prime is 66743041. The next prime is 66743051. The reversal of 66743045 is 54034766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31114084 + 35628961 = 5578^2 + 5969^2 .

It is a cyclic number.

It is not a de Polignac number, because 66743045 - 2² = 66743041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66742996 and 66743014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66743041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6674300 + ... + 6674309.

It is an arithmetic number, because the mean of its divisors is an integer number (20022915).

Almost surely, 2^66743045 is an apocalyptic number.

It is an amenable number.

66743045 is a deficient number, since it is larger than the sum of its proper divisors (13348615).

66743045 is a wasteful number, since it uses less digits than its factorization.

66743045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13348614.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 66743045 is about 8169.6416690085. The cubic root of 66743045 is about 405.6349234239.

The spelling of 66743045 in words is "sixty-six million, seven hundred forty-three thousand, forty-five".