22666740 has 24 divisors (see below), whose sum is σ = 63467040. Its totient is φ = 6044448.

The previous prime is 22666739. The next prime is 22666741. The reversal of 22666740 is 4766622.

It is an interprime number because it is at equal distance from previous prime (22666739) and next prime (22666741).

It is a super-2 number, since 2×22666740² = 1027562204455200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22666741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188830 + ... + 188949.

It is an arithmetic number, because the mean of its divisors is an integer number (2644460).

Almost surely, 2^22666740 is an apocalyptic number.

22666740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22666740 is an abundant number, since it is smaller than the sum of its proper divisors (40800300).

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

22666740 is a wasteful number, since it uses less digits than its factorization.

22666740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377791 (or 377789 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 22666740 is about 4760.9599872295. The cubic root of 22666740 is about 283.0064634949.

It can be divided in two parts, 226 and 66740, that added together give a palindrome (66966).

The spelling of 22666740 in words is "twenty-two million, six hundred sixty-six thousand, seven hundred forty".