66063821607 has 12 divisors (see below), whose sum is σ = 109057737360. Its totient is φ = 37750755168.

The previous prime is 66063821569. The next prime is 66063821611. The reversal of 66063821607 is 70612836066.

66063821607 is a `hidden beast` number, since 6 + 6 + 0 + 6 + 38 + 2 + 1 + 607 = 666.

It is not a de Polignac number, because 66063821607 - 2¹⁰ = 66063820583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66063821647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 524315982 + ... + 524316107.

It is an arithmetic number, because the mean of its divisors is an integer number (9088144780).

Almost surely, 2^66063821607 is an apocalyptic number.

66063821607 is a deficient number, since it is larger than the sum of its proper divisors (42993915753).

66063821607 is a wasteful number, since it uses less digits than its factorization.

66063821607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048632102 (or 1048632099 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 66063821607 in words is "sixty-six billion, sixty-three million, eight hundred twenty-one thousand, six hundred seven".