66325314469 has 4 divisors (see below), whose sum is σ = 66515358700. Its totient is φ = 66135270240.

The previous prime is 66325314467. The next prime is 66325314491. The reversal of 66325314469 is 96441352366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96441352366 = 2 ⋅48220676183.

It can be written as a sum of positive squares in 2 ways, for example, as 48702751969 + 17622562500 = 220687^2 + 132750^2 .

It is a cyclic number.

It is not a de Polignac number, because 66325314469 - 2¹ = 66325314467 is a prime.

It is a super-2 number, since 2×66325314469² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66325314467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95021592 + ... + 95022289.

It is an arithmetic number, because the mean of its divisors is an integer number (16628839675).

Almost surely, 2^66325314469 is an apocalyptic number.

It is an amenable number.

66325314469 is a deficient number, since it is larger than the sum of its proper divisors (190044231).

66325314469 is a wasteful number, since it uses less digits than its factorization.

66325314469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190044230.

The product of its digits is 2799360, while the sum is 49.

The spelling of 66325314469 in words is "sixty-six billion, three hundred twenty-five million, three hundred fourteen thousand, four hundred sixty-nine".