66629129 has 8 divisors (see below), whose sum is σ = 76212480. Its totient is φ = 57062016.

The previous prime is 66629117. The next prime is 66629243. The reversal of 66629129 is 92192666.

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

It is a cyclic number.

It is not a de Polignac number, because 66629129 - 2²⁰ = 65580553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66629429) 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, 6617 + ... + 13305.

It is an arithmetic number, because the mean of its divisors is an integer number (9526560).

Almost surely, 2^66629129 is an apocalyptic number.

It is an amenable number.

66629129 is a deficient number, since it is larger than the sum of its proper divisors (9583351).

66629129 is a wasteful number, since it uses less digits than its factorization.

66629129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8119.

The product of its digits is 69984, while the sum is 41.

The square root of 66629129 is about 8162.6667823696. Note that the first 3 decimals coincide. The cubic root of 66629129 is about 405.4040148596.

It can be divided in two parts, 66 and 629129, that multiplied together give a palindrome (41522514).

The spelling of 66629129 in words is "sixty-six million, six hundred twenty-nine thousand, one hundred twenty-nine".