66471429 has 4 divisors (see below), whose sum is σ = 88628576. Its totient is φ = 44314284.

The previous prime is 66471389. The next prime is 66471467. The reversal of 66471429 is 92417466.

It is a happy number.

66471429 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66471429 - 2⁹ = 66470917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66471529) 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, 11078569 + ... + 11078574.

It is an arithmetic number, because the mean of its divisors is an integer number (22157144).

Almost surely, 2^66471429 is an apocalyptic number.

It is an amenable number.

66471429 is a deficient number, since it is larger than the sum of its proper divisors (22157147).

66471429 is a wasteful number, since it uses less digits than its factorization.

66471429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22157146.

The product of its digits is 72576, while the sum is 39.

The square root of 66471429 is about 8153.0012265423. The cubic root of 66471429 is about 405.0839210333.

The spelling of 66471429 in words is "sixty-six million, four hundred seventy-one thousand, four hundred twenty-nine".