220246661 has 8 divisors (see below), whose sum is σ = 231080448. Its totient is φ = 209646000.

The previous prime is 220246639. The next prime is 220246673. The reversal of 220246661 is 166642022.

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

It is a cyclic number.

It is not a de Polignac number, because 220246661 - 2²² = 216052357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220246361) 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, 56345 + ... + 60126.

It is an arithmetic number, because the mean of its divisors is an integer number (28885056).

Almost surely, 2^220246661 is an apocalyptic number.

It is an amenable number.

220246661 is a deficient number, since it is larger than the sum of its proper divisors (10833787).

220246661 is a wasteful number, since it uses less digits than its factorization.

220246661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116563.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 220246661 is about 14840.7095854612. The cubic root of 220246661 is about 603.9066024101.

Adding to 220246661 its reverse (166642022), we get a palindrome (386888683).

The spelling of 220246661 in words is "two hundred twenty million, two hundred forty-six thousand, six hundred sixty-one".