123666357373 has 4 divisors (see below), whose sum is σ = 133179154108. Its totient is φ = 114153560640.

The previous prime is 123666357299. The next prime is 123666357389. The reversal of 123666357373 is 373753666321.

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 14583460644 + 109082896729 = 120762^2 + 330277^2 .

It is a cyclic number.

It is not a de Polignac number, because 123666357373 - 2⁹ = 123666356861 is a prime.

It is a super-2 number, since 2×123666357373² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123666357373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123666357173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4756398348 + ... + 4756398373.

It is an arithmetic number, because the mean of its divisors is an integer number (33294788527).

Almost surely, 2^123666357373 is an apocalyptic number.

123666357373 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

123666357373 is a deficient number, since it is larger than the sum of its proper divisors (9512796735).

123666357373 is an equidigital number, since it uses as much as digits as its factorization.

123666357373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9512796734.

The product of its digits is 8573040, while the sum is 52.

The spelling of 123666357373 in words is "one hundred twenty-three billion, six hundred sixty-six million, three hundred fifty-seven thousand, three hundred seventy-three".