66100510556506 has 8 divisors (see below), whose sum is σ = 99583738612020. Its totient is φ = 32905931019168.

The previous prime is 66100510556329. The next prime is 66100510556527. The reversal of 66100510556506 is 60565501500166.

66100510556506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 65970051618025 + 130458938481 = 8122195^2 + 361191^2 .

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

It is a super-2 number, since 2×66100510556506² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72162128971 + ... + 72162129886.

Almost surely, 2^{66100510556506} is an apocalyptic number.

66100510556506 is a deficient number, since it is larger than the sum of its proper divisors (33483228055514).

66100510556506 is a wasteful number, since it uses less digits than its factorization.

66100510556506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144324259088.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 66100510556506 in words is "sixty-six trillion, one hundred billion, five hundred ten million, five hundred fifty-six thousand, five hundred six".