66021227612 has 12 divisors (see below), whose sum is σ = 115541954976. Its totient is φ = 33009240480.

The previous prime is 66021227513. The next prime is 66021227677. The reversal of 66021227612 is 21672212066.

It is a super-2 number, since 2×66021227612² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231089 + ... + 430632.

It is an arithmetic number, because the mean of its divisors is an integer number (9628496248).

Almost surely, 2^66021227612 is an apocalyptic number.

It is an amenable number.

66021227612 is a deficient number, since it is larger than the sum of its proper divisors (49520727364).

66021227612 is a wasteful number, since it uses less digits than its factorization.

66021227612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686668 (or 686666 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

Adding to 66021227612 its reverse (21672212066), we get a palindrome (87693439678).

The spelling of 66021227612 in words is "sixty-six billion, twenty-one million, two hundred twenty-seven thousand, six hundred twelve".