66572671251 has 16 divisors (see below), whose sum is σ = 90836089344. Its totient is φ = 43345704864.

The previous prime is 66572671223. The next prime is 66572671267. The reversal of 66572671251 is 15217627566.

It is not a de Polignac number, because 66572671251 - 2¹¹ = 66572669203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66572671251.

It is not an unprimeable number, because it can be changed into a prime (66572671201) 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, 2255350 + ... + 2284676.

It is an arithmetic number, because the mean of its divisors is an integer number (5677255584).

Almost surely, 2^66572671251 is an apocalyptic number.

66572671251 is a deficient number, since it is larger than the sum of its proper divisors (24263418093).

66572671251 is a wasteful number, since it uses less digits than its factorization.

66572671251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46970.

The product of its digits is 1058400, while the sum is 48.

The spelling of 66572671251 in words is "sixty-six billion, five hundred seventy-two million, six hundred seventy-one thousand, two hundred fifty-one".