66107555323 has 4 divisors (see below), whose sum is σ = 69586900360. Its totient is φ = 62628210288.

The previous prime is 66107555321. The next prime is 66107555383. The reversal of 66107555323 is 32355570166.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32355570166 = 2 ⋅16177785083.

It is a cyclic number.

It is not a de Polignac number, because 66107555323 - 2¹ = 66107555321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66107555323.

It is not an unprimeable number, because it can be changed into a prime (66107555321) 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, 1739672490 + ... + 1739672527.

It is an arithmetic number, because the mean of its divisors is an integer number (17396725090).

Almost surely, 2^66107555323 is an apocalyptic number.

66107555323 is a deficient number, since it is larger than the sum of its proper divisors (3479345037).

66107555323 is a wasteful number, since it uses less digits than its factorization.

66107555323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479345036.

The product of its (nonzero) digits is 567000, while the sum is 43.

The spelling of 66107555323 in words is "sixty-six billion, one hundred seven million, five hundred fifty-five thousand, three hundred twenty-three".