22061661 has 8 divisors (see below), whose sum is σ = 29438304. Its totient is φ = 14696400.

The previous prime is 22061647. The next prime is 22061671. The reversal of 22061661 is 16616022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22061661 - 2⁵ = 22061629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22061671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4111 + ... + 7811.

It is an arithmetic number, because the mean of its divisors is an integer number (3679788).

Almost surely, 2^22061661 is an apocalyptic number.

It is an amenable number.

22061661 is a deficient number, since it is larger than the sum of its proper divisors (7376643).

22061661 is a wasteful number, since it uses less digits than its factorization.

22061661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5691.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 22061661 is about 4696.9842452365. The cubic root of 22061661 is about 280.4654715205.

Adding to 22061661 its reverse (16616022), we get a palindrome (38677683).

It can be divided in two parts, 22061 and 661, that added together give a palindrome (22722).

The spelling of 22061661 in words is "twenty-two million, sixty-one thousand, six hundred sixty-one".