66641374063 has 8 divisors (see below), whose sum is σ = 73619930880. Its totient is φ = 59816192280.

The previous prime is 66641374061. The next prime is 66641374067. The reversal of 66641374063 is 36047314666.

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 66641374063 - 2¹ = 66641374061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66641374061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38342845 + ... + 38344582.

It is an arithmetic number, because the mean of its divisors is an integer number (9202491360).

Almost surely, 2^66641374063 is an apocalyptic number.

66641374063 is a deficient number, since it is larger than the sum of its proper divisors (6978556817).

66641374063 is a wasteful number, since it uses less digits than its factorization.

66641374063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76687517.

The product of its (nonzero) digits is 1306368, while the sum is 46.

The spelling of 66641374063 in words is "sixty-six billion, six hundred forty-one million, three hundred seventy-four thousand, sixty-three".