123655023666 has 24 divisors (see below), whose sum is σ = 268149632400. Its totient is φ = 41182892856.

The previous prime is 123655023659. The next prime is 123655023673. The reversal of 123655023666 is 666320556321.

It is an interprime number because it is at equal distance from previous prime (123655023659) and next prime (123655023673).

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 11 ways as a sum of consecutive naturals, for example, 2932516 + ... + 2974383.

It is an arithmetic number, because the mean of its divisors is an integer number (11172901350).

Almost surely, 2^123655023666 is an apocalyptic number.

123655023666 is an abundant number, since it is smaller than the sum of its proper divisors (144494608734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123655023666 is a wasteful number, since it uses less digits than its factorization.

123655023666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5908070 (or 5908067 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 45.

Adding to 123655023666 its reverse (666320556321), we get a palindrome (789975579987).

The spelling of 123655023666 in words is "one hundred twenty-three billion, six hundred fifty-five million, twenty-three thousand, six hundred sixty-six".