66073261212 has 72 divisors (see below), whose sum is σ = 191582856192. Its totient is φ = 18808394400.

The previous prime is 66073261211. The next prime is 66073261231. The reversal of 66073261212 is 21216237066.

66073261212 is a `hidden beast` number, since 6 + 6 + 0 + 7 + 32 + 612 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66073261211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 415464 + ... + 552047.

Almost surely, 2^66073261212 is an apocalyptic number.

It is an amenable number.

66073261212 is an abundant number, since it is smaller than the sum of its proper divisors (125509594980).

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

66073261212 is a wasteful number, since it uses less digits than its factorization.

66073261212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967799 (or 967794 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

Adding to 66073261212 its reverse (21216237066), we get a palindrome (87289498278).

The spelling of 66073261212 in words is "sixty-six billion, seventy-three million, two hundred sixty-one thousand, two hundred twelve".