66210384929 has 8 divisors (see below), whose sum is σ = 71757656040. Its totient is φ = 60727994496.

The previous prime is 66210384907. The next prime is 66210384937. The reversal of 66210384929 is 92948301266.

It can be written as a sum of positive squares in 4 ways, for example, as 5963700625 + 60246684304 = 77225^2 + 245452^2 .

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

It is not a de Polignac number, because 66210384929 - 2¹² = 66210380833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66210384979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16218044 + ... + 16222125.

It is an arithmetic number, because the mean of its divisors is an integer number (8969707005).

Almost surely, 2^66210384929 is an apocalyptic number.

It is an amenable number.

66210384929 is a deficient number, since it is larger than the sum of its proper divisors (5547271111).

66210384929 is a wasteful number, since it uses less digits than its factorization.

66210384929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32440339.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 66210384929 in words is "sixty-six billion, two hundred ten million, three hundred eighty-four thousand, nine hundred twenty-nine".