66631246253 has 16 divisors (see below), whose sum is σ = 78530214336. Its totient is φ = 55735655040.

The previous prime is 66631246237. The next prime is 66631246291. The reversal of 66631246253 is 35264213666.

It is not a de Polignac number, because 66631246253 - 2⁴ = 66631246237 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 (66631246153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 699575 + ... + 789092.

It is an arithmetic number, because the mean of its divisors is an integer number (4908138396).

Almost surely, 2^66631246253 is an apocalyptic number.

It is an amenable number.

66631246253 is a deficient number, since it is larger than the sum of its proper divisors (11898968083).

66631246253 is a wasteful number, since it uses less digits than its factorization.

66631246253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489004.

The product of its digits is 933120, while the sum is 44.

The spelling of 66631246253 in words is "sixty-six billion, six hundred thirty-one million, two hundred forty-six thousand, two hundred fifty-three".