66651100106 has 8 divisors (see below), whose sum is σ = 100195418820. Its totient is φ = 33252627168.

The previous prime is 66651100093. The next prime is 66651100129. The reversal of 66651100106 is 60100115666.

It can be written as a sum of positive squares in 2 ways, for example, as 49321747225 + 17329352881 = 222085^2 + 131641^2 .

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

It is a super-2 number, since 2×66651100106² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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, 36460301 + ... + 36462128.

Almost surely, 2^66651100106 is an apocalyptic number.

66651100106 is a deficient number, since it is larger than the sum of its proper divisors (33544318714).

66651100106 is a wasteful number, since it uses less digits than its factorization.

66651100106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72922888.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 66651100106 in words is "sixty-six billion, six hundred fifty-one million, one hundred thousand, one hundred six".