22072661 has 8 divisors (see below), whose sum is σ = 25021920. Its totient is φ = 19302192.

The previous prime is 22072649. The next prime is 22072691. The reversal of 22072661 is 16627022.

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

It is not a de Polignac number, because 22072661 - 2⁶ = 22072597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22072661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22072601) 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, 44435 + ... + 44928.

It is an arithmetic number, because the mean of its divisors is an integer number (3127740).

Almost surely, 2^22072661 is an apocalyptic number.

It is an amenable number.

22072661 is a deficient number, since it is larger than the sum of its proper divisors (2949259).

22072661 is a wasteful number, since it uses less digits than its factorization.

22072661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89395.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 22072661 is about 4698.1550634265. The cubic root of 22072661 is about 280.5120773733.

Adding to 22072661 its reverse (16627022), we get a palindrome (38699683).

The spelling of 22072661 in words is "twenty-two million, seventy-two thousand, six hundred sixty-one".