523006621066 has 4 divisors (see below), whose sum is σ = 784509931602. Its totient is φ = 261503310532.

The previous prime is 523006621037. The next prime is 523006621097. The reversal of 523006621066 is 660126600325.

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

It can be written as a sum of positive squares in only one way, i.e., 455720855041 + 67285766025 = 675071^2 + 259395^2 .

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 as a sum of consecutive naturals, namely, 130751655265 + ... + 130751655268.

Almost surely, 2^523006621066 is an apocalyptic number.

523006621066 is a deficient number, since it is larger than the sum of its proper divisors (261503310536).

523006621066 is a wasteful number, since it uses less digits than its factorization.

523006621066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261503310535.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 523006621066 in words is "five hundred twenty-three billion, six million, six hundred twenty-one thousand, sixty-six".