23666742 has 96 divisors (see below), whose sum is σ = 61326720.
Its totient is φ = 6765120.
The previous prime is 23666711. The next prime is 23666749. The reversal of 23666742 is 24766632.
It is a happy number.
It is a super-2 number, since 2×236667422 = 1120229353789128, which contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 23666697 and 23666706.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (23666749) by changing a digit.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 101458 + ... + 101690.
It is an arithmetic number, because the mean of its divisors is an integer number (638820).
Almost surely, 223666742 is an apocalyptic number.
23666742 is a gapful number since it is divisible by the number (22) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 23666742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30663360).
23666742 is an abundant number, since it is smaller than the sum of its proper divisors (37659978).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
23666742 is a wasteful number, since it uses less digits than its factorization.
23666742 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 280 (or 268 counting only the distinct ones).
The product of its digits is 72576, while the sum is 36.
The square root of 23666742 is about 4864.8475824017.
The cubic root of 23666742 is about 287.1085717903.
The spelling of 23666742 in words is "twenty-three million, six hundred sixty-six thousand, seven hundred forty-two".