66260857633 has 8 divisors (see below), whose sum is σ = 67517333568. Its totient is φ = 65004614064.

The previous prime is 66260857547. The next prime is 66260857657. The reversal of 66260857633 is 33675806266.

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 66260857633 - 2⁹ = 66260857121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66260852633) 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, 584310 + ... + 688432.

It is an arithmetic number, because the mean of its divisors is an integer number (8439666696).

Almost surely, 2^66260857633 is an apocalyptic number.

It is an amenable number.

66260857633 is a deficient number, since it is larger than the sum of its proper divisors (1256475935).

66260857633 is a wasteful number, since it uses less digits than its factorization.

66260857633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116183.

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 66260857633 in words is "sixty-six billion, two hundred sixty million, eight hundred fifty-seven thousand, six hundred thirty-three".