22146661 has 2 divisors, whose sum is σ = 22146662. Its totient is φ = 22146660.

The previous prime is 22146659. The next prime is 22146697. The reversal of 22146661 is 16664122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22146436 + 225 = 4706^2 + 15^2 .

It is a cyclic number.

It is not a de Polignac number, because 22146661 - 2¹ = 22146659 is a prime.

Together with 22146659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22146611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11073330 + 11073331.

It is an arithmetic number, because the mean of its divisors is an integer number (11073331).

Almost surely, 2^22146661 is an apocalyptic number.

It is an amenable number.

22146661 is a deficient number, since it is larger than the sum of its proper divisors (1).

22146661 is an equidigital number, since it uses as much as digits as its factorization.

22146661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 22146661 is about 4706.0239055916. The cubic root of 22146661 is about 280.8252058999.

The spelling of 22146661 in words is "twenty-two million, one hundred forty-six thousand, six hundred sixty-one".