660500623 has 2 divisors, whose sum is σ = 660500624. Its totient is φ = 660500622.

The previous prime is 660500587. The next prime is 660500669. The reversal of 660500623 is 326005066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660500623 - 2⁹ = 660500111 is a prime.

It is a super-2 number, since 2×660500623² = 872522145966776258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 660500591 and 660500600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660000623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330250311 + 330250312.

It is an arithmetic number, because the mean of its divisors is an integer number (330250312).

Almost surely, 2^660500623 is an apocalyptic number.

660500623 is a deficient number, since it is larger than the sum of its proper divisors (1).

660500623 is an equidigital number, since it uses as much as digits as its factorization.

660500623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 660500623 is about 25700.2066723208. The cubic root of 660500623 is about 870.8788507566.

Adding to 660500623 its reverse (326005066), we get a palindrome (986505689).

The spelling of 660500623 in words is "six hundred sixty million, five hundred thousand, six hundred twenty-three".