889466661 has 6 divisors (see below), whose sum is σ = 1284785190. Its totient is φ = 592977768.

The previous prime is 889466659. The next prime is 889466671. The reversal of 889466661 is 166664988.

It can be written as a sum of positive squares in only one way, i.e., 565250625 + 324216036 = 23775^2 + 18006^2 .

It is not a de Polignac number, because 889466661 - 2¹ = 889466659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 889466598 and 889466607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889466651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49414806 + ... + 49414823.

It is an arithmetic number, because the mean of its divisors is an integer number (214130865).

Almost surely, 2^889466661 is an apocalyptic number.

It is an amenable number.

889466661 is a deficient number, since it is larger than the sum of its proper divisors (395318529).

889466661 is a wasteful number, since it uses less digits than its factorization.

889466661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98829635 (or 98829632 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 889466661 is about 29823.9276588447. The cubic root of 889466661 is about 961.7079913131.

The spelling of 889466661 in words is "eight hundred eighty-nine million, four hundred sixty-six thousand, six hundred sixty-one".