889742661 has 8 divisors (see below), whose sum is σ = 1190516640. Its totient is φ = 591065232.

The previous prime is 889742611. The next prime is 889742723. The reversal of 889742661 is 166247988.

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

It is not a de Polignac number, because 889742661 - 2²⁶ = 822633797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889742611) 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, 523146 + ... + 524843.

It is an arithmetic number, because the mean of its divisors is an integer number (148814580).

Almost surely, 2^889742661 is an apocalyptic number.

It is an amenable number.

889742661 is a deficient number, since it is larger than the sum of its proper divisors (300773979).

889742661 is a wasteful number, since it uses less digits than its factorization.

889742661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048275.

The product of its digits is 1161216, while the sum is 51.

The square root of 889742661 is about 29828.5544570970. The cubic root of 889742661 is about 961.8074531471.

The spelling of 889742661 in words is "eight hundred eighty-nine million, seven hundred forty-two thousand, six hundred sixty-one".