22166671720 has 16 divisors (see below), whose sum is σ = 49875011460. Its totient is φ = 8866668672.

The previous prime is 22166671691. The next prime is 22166671729. The reversal of 22166671720 is 2717666122.

It can be written as a sum of positive squares in 2 ways, for example, as 19150684996 + 3015986724 = 138386^2 + 54918^2 .

It is a super-2 number, since 2×22166671720² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 554166793 = 22166671720 / (2 + 2 + 1 + 6 + 6 + 6 + 7 + 1 + 7 + 2 + 0).

It is not an unprimeable number, because it can be changed into a prime (22166671729) 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, 277083357 + ... + 277083436.

Almost surely, 2^22166671720 is an apocalyptic number.

22166671720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22166671720 is an abundant number, since it is smaller than the sum of its proper divisors (27708339740).

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

22166671720 is a wasteful number, since it uses less digits than its factorization.

22166671720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554166804 (or 554166800 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 22166671720 in words is "twenty-two billion, one hundred sixty-six million, six hundred seventy-one thousand, seven hundred twenty".