506666503231723 has 4 divisors (see below), whose sum is σ = 506757483036760. Its totient is φ = 506575523426688.

The previous prime is 506666503231663. The next prime is 506666503231729. The reversal of 506666503231723 is 327132305666605.

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

It is a cyclic number.

It is not a de Polignac number, because 506666503231723 - 2³³ = 506657913297131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506666503231729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45489894165 + ... + 45489905302.

It is an arithmetic number, because the mean of its divisors is an integer number (126689370759190).

Almost surely, 2^{506666503231723} is an apocalyptic number.

506666503231723 is a deficient number, since it is larger than the sum of its proper divisors (90979805037).

506666503231723 is an equidigital number, since it uses as much as digits as its factorization.

506666503231723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90979805036.

The product of its (nonzero) digits is 24494400, while the sum is 55.

The spelling of 506666503231723 in words is "five hundred six trillion, six hundred sixty-six billion, five hundred three million, two hundred thirty-one thousand, seven hundred twenty-three".