66261210353 has 8 divisors (see below), whose sum is σ = 71468526528. Its totient is φ = 61069651344.

The previous prime is 66261210331. The next prime is 66261210373. The reversal of 66261210353 is 35301216266.

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

It is not a de Polignac number, because 66261210353 - 2¹² = 66261206257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66261210373) 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 7 ways as a sum of consecutive naturals, for example, 3930551 + ... + 3947372.

It is an arithmetic number, because the mean of its divisors is an integer number (8933565816).

Almost surely, 2^66261210353 is an apocalyptic number.

It is an amenable number.

66261210353 is a deficient number, since it is larger than the sum of its proper divisors (5207316175).

66261210353 is a wasteful number, since it uses less digits than its factorization.

66261210353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7878583.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 66261210353 in words is "sixty-six billion, two hundred sixty-one million, two hundred ten thousand, three hundred fifty-three".