8661355287 has 48 divisors (see below), whose sum is σ = 12659781888. Its totient is φ = 5264663040.

The previous prime is 8661355277. The next prime is 8661355309. The reversal of 8661355287 is 7825531668.

It is a happy number.

It is not a de Polignac number, because 8661355287 - 2⁷ = 8661355159 is a prime.

Its product of digits (2419200) is a multiple of the sum of its prime factors (840).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8661355237) 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 47 ways as a sum of consecutive naturals, for example, 25701183 + ... + 25701519.

It is an arithmetic number, because the mean of its divisors is an integer number (263745456).

Almost surely, 2^8661355287 is an apocalyptic number.

8661355287 is a deficient number, since it is larger than the sum of its proper divisors (3998426601).

8661355287 is a wasteful number, since it uses less digits than its factorization.

8661355287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840 (or 827 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 51.

The square root of 8661355287 is about 93066.4025682738. The cubic root of 8661355287 is about 2053.6603481534.

The spelling of 8661355287 in words is "eight billion, six hundred sixty-one million, three hundred fifty-five thousand, two hundred eighty-seven".