66470545 has 4 divisors (see below), whose sum is σ = 79764660. Its totient is φ = 53176432.

The previous prime is 66470543. The next prime is 66470557. The reversal of 66470545 is 54507466.

It is a happy number.

66470545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 14500864 + 51969681 = 3808^2 + 7209^2 .

It is a cyclic number.

It is not a de Polignac number, because 66470545 - 2¹ = 66470543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66470543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6647050 + ... + 6647059.

It is an arithmetic number, because the mean of its divisors is an integer number (19941165).

Almost surely, 2^66470545 is an apocalyptic number.

It is an amenable number.

66470545 is a deficient number, since it is larger than the sum of its proper divisors (13294115).

66470545 is a wasteful number, since it uses less digits than its factorization.

66470545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13294114.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 66470545 is about 8152.9470131971. The cubic root of 66470545 is about 405.0821252955.

The spelling of 66470545 in words is "sixty-six million, four hundred seventy thousand, five hundred forty-five".