66129297 has 8 divisors (see below), whose sum is σ = 94954944. Its totient is φ = 40694928.

The previous prime is 66129289. The next prime is 66129373. The reversal of 66129297 is 79292166.

66129297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 66129297 - 2³ = 66129289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66129247) 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 7 ways as a sum of consecutive naturals, for example, 847773 + ... + 847850.

It is an arithmetic number, because the mean of its divisors is an integer number (11869368).

Almost surely, 2^66129297 is an apocalyptic number.

It is an amenable number.

66129297 is a deficient number, since it is larger than the sum of its proper divisors (28825647).

66129297 is a wasteful number, since it uses less digits than its factorization.

66129297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695639.

The product of its digits is 81648, while the sum is 42.

The square root of 66129297 is about 8131.9921913391. The cubic root of 66129297 is about 404.3877290159.

The spelling of 66129297 in words is "sixty-six million, one hundred twenty-nine thousand, two hundred ninety-seven".