66572671212 has 18 divisors (see below), whose sum is σ = 168280918988. Its totient is φ = 22190890392.

The previous prime is 66572671201. The next prime is 66572671223. The reversal of 66572671212 is 21217627566.

66572671212 is a `hidden beast` number, since 6 + 6 + 572 + 6 + 71 + 2 + 1 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (66572671201) and next prime (66572671223).

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 924620398 + ... + 924620469.

Almost surely, 2^66572671212 is an apocalyptic number.

It is an amenable number.

66572671212 is an abundant number, since it is smaller than the sum of its proper divisors (101708247776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66572671212 is a wasteful number, since it uses less digits than its factorization.

66572671212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849240877 (or 1849240872 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The spelling of 66572671212 in words is "sixty-six billion, five hundred seventy-two million, six hundred seventy-one thousand, two hundred twelve".