123666970585 has 4 divisors (see below), whose sum is σ = 148400364708. Its totient is φ = 98933576464.

The previous prime is 123666970571. The next prime is 123666970597. The reversal of 123666970585 is 585079666321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18680602329 + 104986368256 = 136677^2 + 324016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123666970585 is a prime.

It is a super-2 number, since 2×123666970585² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12366697054 + ... + 12366697063.

It is an arithmetic number, because the mean of its divisors is an integer number (37100091177).

Almost surely, 2^123666970585 is an apocalyptic number.

It is an amenable number.

123666970585 is a deficient number, since it is larger than the sum of its proper divisors (24733394123).

123666970585 is an equidigital number, since it uses as much as digits as its factorization.

123666970585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24733394122.

The product of its (nonzero) digits is 16329600, while the sum is 58.

The spelling of 123666970585 in words is "one hundred twenty-three billion, six hundred sixty-six million, nine hundred seventy thousand, five hundred eighty-five".