22666429 has 4 divisors (see below), whose sum is σ = 23448060. Its totient is φ = 21884800.

The previous prime is 22666421. The next prime is 22666439. The reversal of 22666429 is 92466622.

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 7689529 + 14976900 = 2773^2 + 3870^2 .

It is a cyclic number.

It is not a de Polignac number, because 22666429 - 2³ = 22666421 is a prime.

It is a super-2 number, since 2×22666429² = 1027534007224082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22666421) 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, 390772 + ... + 390829.

It is an arithmetic number, because the mean of its divisors is an integer number (5862015).

Almost surely, 2^22666429 is an apocalyptic number.

22666429 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

22666429 is a deficient number, since it is larger than the sum of its proper divisors (781631).

22666429 is an equidigital number, since it uses as much as digits as its factorization.

22666429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781630.

The product of its digits is 62208, while the sum is 37.

The square root of 22666429 is about 4760.9273256373. The cubic root of 22666429 is about 283.0051691548.

The spelling of 22666429 in words is "twenty-two million, six hundred sixty-six thousand, four hundred twenty-nine".