66032129 has 4 divisors (see below), whose sum is σ = 66057684. Its totient is φ = 66006576.

The previous prime is 66032123. The next prime is 66032137. The reversal of 66032129 is 92123066.

66032129 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 49000000 + 17032129 = 7000^2 + 4127^2 .

It is a cyclic number.

It is not a de Polignac number, because 66032129 - 2²⁴ = 49254913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66032123) 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, 8402 + ... + 14235.

It is an arithmetic number, because the mean of its divisors is an integer number (16514421).

Almost surely, 2^66032129 is an apocalyptic number.

It is an amenable number.

66032129 is a deficient number, since it is larger than the sum of its proper divisors (25555).

66032129 is a wasteful number, since it uses less digits than its factorization.

66032129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25554.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 66032129 is about 8126.0155672999. The cubic root of 66032129 is about 404.1895676871.

It can be divided in two parts, 66032 and 129, that multiplied together give a triangular number (8518128 = T₄₁₂₇).

The spelling of 66032129 in words is "sixty-six million, thirty-two thousand, one hundred twenty-nine".