66147429 has 8 divisors (see below), whose sum is σ = 88248160. Its totient is φ = 44072496.

The previous prime is 66147427. The next prime is 66147451. The reversal of 66147429 is 92474166.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66147429 - 2¹ = 66147427 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 (66147427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 654 + ... + 11520.

It is an arithmetic number, because the mean of its divisors is an integer number (11031020).

Almost surely, 2^66147429 is an apocalyptic number.

It is an amenable number.

66147429 is a deficient number, since it is larger than the sum of its proper divisors (22100731).

66147429 is a wasteful number, since it uses less digits than its factorization.

66147429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12899.

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

The square root of 66147429 is about 8133.1069708937. The cubic root of 66147429 is about 404.4246853453.

The spelling of 66147429 in words is "sixty-six million, one hundred forty-seven thousand, four hundred twenty-nine".