66056066131 has 4 divisors (see below), whose sum is σ = 72061163064. Its totient is φ = 60050969200.

The previous prime is 66056066123. The next prime is 66056066143. The reversal of 66056066131 is 13166065066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66056066131 - 2³ = 66056066123 is a prime.

It is a super-2 number, since 2×66056066131² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66056066231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3002548450 + ... + 3002548471.

It is an arithmetic number, because the mean of its divisors is an integer number (18015290766).

Almost surely, 2^66056066131 is an apocalyptic number.

66056066131 is a deficient number, since it is larger than the sum of its proper divisors (6005096933).

66056066131 is a wasteful number, since it uses less digits than its factorization.

66056066131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6005096932.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 66056066131 in words is "sixty-six billion, fifty-six million, sixty-six thousand, one hundred thirty-one".