75666346222655 has 4 divisors (see below), whose sum is σ = 90799615467192. Its totient is φ = 60533076978120.

The previous prime is 75666346222651. The next prime is 75666346222673. The reversal of 75666346222655 is 55622264366657.

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

It is not a de Polignac number, because 75666346222655 - 2² = 75666346222651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75666346222591 and 75666346222600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75666346222651) 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, 7566634622261 + ... + 7566634622270.

It is an arithmetic number, because the mean of its divisors is an integer number (22699903866798).

Almost surely, 2^{75666346222655} is an apocalyptic number.

75666346222655 is a deficient number, since it is larger than the sum of its proper divisors (15133269244537).

75666346222655 is a wasteful number, since it uses less digits than its factorization.

75666346222655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15133269244536.

The product of its digits is 653184000, while the sum is 65.

The spelling of 75666346222655 in words is "seventy-five trillion, six hundred sixty-six billion, three hundred forty-six million, two hundred twenty-two thousand, six hundred fifty-five".