66061002131 has 8 divisors (see below), whose sum is σ = 69570571200. Its totient is φ = 62554700520.

The previous prime is 66061002113. The next prime is 66061002191. The reversal of 66061002131 is 13120016066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66061002131 - 2¹⁴ = 66060985747 is a prime.

It is a super-2 number, since 2×66061002131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66061002131.

It is not an unprimeable number, because it can be changed into a prime (66061002191) 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 7 ways as a sum of consecutive naturals, for example, 775301 + ... + 856278.

It is an arithmetic number, because the mean of its divisors is an integer number (8696321400).

Almost surely, 2^66061002131 is an apocalyptic number.

66061002131 is a deficient number, since it is larger than the sum of its proper divisors (3509569069).

66061002131 is a wasteful number, since it uses less digits than its factorization.

66061002131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633729.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 66061002131 its reverse (13120016066), we get a palindrome (79181018197).

The spelling of 66061002131 in words is "sixty-six billion, sixty-one million, two thousand, one hundred thirty-one".