66130818437 has 4 divisors (see below), whose sum is σ = 66318158220. Its totient is φ = 65943478656.

The previous prime is 66130818407. The next prime is 66130818449. The reversal of 66130818437 is 73481803166.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37664717476 + 28466100961 = 194074^2 + 168719^2 .

It is a cyclic number.

It is not a de Polignac number, because 66130818437 - 2⁸ = 66130818181 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66130818391 and 66130818400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66130818407) 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 3 ways as a sum of consecutive naturals, for example, 93669362 + ... + 93670067.

It is an arithmetic number, because the mean of its divisors is an integer number (16579539555).

Almost surely, 2^66130818437 is an apocalyptic number.

It is an amenable number.

66130818437 is a deficient number, since it is larger than the sum of its proper divisors (187339783).

66130818437 is a wasteful number, since it uses less digits than its factorization.

66130818437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187339782.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 66130818437 in words is "sixty-six billion, one hundred thirty million, eight hundred eighteen thousand, four hundred thirty-seven".