8890661857 has 16 divisors (see below), whose sum is σ = 11148550272. Its totient is φ = 6887733120.

The previous prime is 8890661837. The next prime is 8890661867. The reversal of 8890661857 is 7581660988.

It is a cyclic number.

It is not a de Polignac number, because 8890661857 - 2⁷ = 8890661729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8890661827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320388 + ... + 347029.

It is an arithmetic number, because the mean of its divisors is an integer number (696784392).

Almost surely, 2^8890661857 is an apocalyptic number.

It is an amenable number.

8890661857 is a deficient number, since it is larger than the sum of its proper divisors (2257888415).

8890661857 is a wasteful number, since it uses less digits than its factorization.

8890661857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667608.

The product of its (nonzero) digits is 5806080, while the sum is 58.

The square root of 8890661857 is about 94290.3062727023. The cubic root of 8890661857 is about 2071.6260537504.

The spelling of 8890661857 in words is "eight billion, eight hundred ninety million, six hundred sixty-one thousand, eight hundred fifty-seven".