66126330505 has 8 divisors (see below), whose sum is σ = 80652442824. Its totient is φ = 52033833600.

The previous prime is 66126330503. The next prime is 66126330509. The reversal of 66126330505 is 50503362166.

It can be written as a sum of positive squares in 4 ways, for example, as 5190914304 + 60935416201 = 72048^2 + 246851^2 .

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

It is not a de Polignac number, because 66126330505 - 2¹ = 66126330503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66126330503) 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, 108403516 + ... + 108404125.

It is an arithmetic number, because the mean of its divisors is an integer number (10081555353).

Almost surely, 2^66126330505 is an apocalyptic number.

It is an amenable number.

66126330505 is a deficient number, since it is larger than the sum of its proper divisors (14526112319).

66126330505 is a wasteful number, since it uses less digits than its factorization.

66126330505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216807707.

The product of its (nonzero) digits is 97200, while the sum is 37.

The spelling of 66126330505 in words is "sixty-six billion, one hundred twenty-six million, three hundred thirty thousand, five hundred five".