66660270253 has 4 divisors (see below), whose sum is σ = 66676616640. Its totient is φ = 66643923868.

The previous prime is 66660270221. The next prime is 66660270311. The reversal of 66660270253 is 35207206666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66660270253 - 2⁵ = 66660270221 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 (66660270353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8167075 + ... + 8175232.

It is an arithmetic number, because the mean of its divisors is an integer number (16669154160).

Almost surely, 2^66660270253 is an apocalyptic number.

It is an amenable number.

66660270253 is a deficient number, since it is larger than the sum of its proper divisors (16346387).

66660270253 is a wasteful number, since it uses less digits than its factorization.

66660270253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16346386.

The product of its (nonzero) digits is 544320, while the sum is 43.

The spelling of 66660270253 in words is "sixty-six billion, six hundred sixty million, two hundred seventy thousand, two hundred fifty-three".