220229678661 has 32 divisors (see below), whose sum is σ = 315166673280. Its totient is φ = 136374451200.

The previous prime is 220229678653. The next prime is 220229678671. The reversal of 220229678661 is 166876922022.

It is a happy number.

220229678661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220229678661 - 2³ = 220229678653 is a prime.

It is a super-2 number, since 2×220229678661² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220229678651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 987121 + ... + 1189481.

It is an arithmetic number, because the mean of its divisors is an integer number (9848958540).

Almost surely, 2^220229678661 is an apocalyptic number.

It is an amenable number.

220229678661 is a deficient number, since it is larger than the sum of its proper divisors (94936994619).

220229678661 is a wasteful number, since it uses less digits than its factorization.

220229678661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202757.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 220229678661 in words is "two hundred twenty billion, two hundred twenty-nine million, six hundred seventy-eight thousand, six hundred sixty-one".