100666408078433 has 4 divisors (see below), whose sum is σ = 100671581886660. Its totient is φ = 100661234270208.

The previous prime is 100666408078393. The next prime is 100666408078447. The reversal of 100666408078433 is 334870804666001.

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 49295115018304 + 51371293060129 = 7021048^2 + 7167377^2 .

It is a cyclic number.

It is not a de Polignac number, because 100666408078433 - 2⁴⁰ = 99566896450657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100666408078463) 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, 2586874928 + ... + 2586913841.

It is an arithmetic number, because the mean of its divisors is an integer number (25167895471665).

Almost surely, 2^{100666408078433} is an apocalyptic number.

It is an amenable number.

100666408078433 is a deficient number, since it is larger than the sum of its proper divisors (5173808227).

100666408078433 is an equidigital number, since it uses as much as digits as its factorization.

100666408078433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5173808226.

The product of its (nonzero) digits is 13934592, while the sum is 56.

The spelling of 100666408078433 in words is "one hundred trillion, six hundred sixty-six billion, four hundred eight million, seventy-eight thousand, four hundred thirty-three".