66225129 has 8 divisors (see below), whose sum is σ = 88349952. Its totient is φ = 44125200.

The previous prime is 66225109. The next prime is 66225139. The reversal of 66225129 is 92152266.

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

It is not a de Polignac number, because 66225129 - 2⁵ = 66225097 is a prime.

It is a super-2 number, since 2×66225129² = 8771535422133282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66225129.

It is not an unprimeable number, because it can be changed into a prime (66225109) 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, 1279 + ... + 11579.

It is an arithmetic number, because the mean of its divisors is an integer number (11043744).

Almost surely, 2^66225129 is an apocalyptic number.

It is an amenable number.

66225129 is a deficient number, since it is larger than the sum of its proper divisors (22124823).

66225129 is a wasteful number, since it uses less digits than its factorization.

66225129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12447.

The product of its digits is 12960, while the sum is 33.

The square root of 66225129 is about 8137.8823412482. The cubic root of 66225129 is about 404.5829757106.

The spelling of 66225129 in words is "sixty-six million, two hundred twenty-five thousand, one hundred twenty-nine".