8661057500 has 30 divisors (see below), whose sum is σ = 18940006008. Its totient is φ = 3464422000.

The previous prime is 8661057497. The next prime is 8661057521. The reversal of 8661057500 is 57501668.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1729712 + ... + 1734711.

Almost surely, 2^8661057500 is an apocalyptic number.

It is an amenable number.

8661057500 is an abundant number, since it is smaller than the sum of its proper divisors (10278948508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8661057500 is a wasteful number, since it uses less digits than its factorization.

8661057500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3464447 (or 3464430 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 8661057500 is about 93064.8026914580. The cubic root of 8661057500 is about 2053.6368121769.

The spelling of 8661057500 in words is "eight billion, six hundred sixty-one million, fifty-seven thousand, five hundred".