123345666779 has 8 divisors (see below), whose sum is σ = 123694660320. Its totient is φ = 122996880000.

The previous prime is 123345666757. The next prime is 123345666811. The reversal of 123345666779 is 977666543321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123345666779 - 2²⁰ = 123344618203 is a prime.

It is a super-2 number, since 2×123345666779² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (123345666079) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1184729 + ... + 1284629.

It is an arithmetic number, because the mean of its divisors is an integer number (15461832540).

Almost surely, 2^123345666779 is an apocalyptic number.

123345666779 is a deficient number, since it is larger than the sum of its proper divisors (348993541).

123345666779 is an equidigital number, since it uses as much as digits as its factorization.

123345666779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103381.

The product of its digits is 34292160, while the sum is 59.

The spelling of 123345666779 in words is "one hundred twenty-three billion, three hundred forty-five million, six hundred sixty-six thousand, seven hundred seventy-nine".