866635116 has 12 divisors (see below), whose sum is σ = 2022148632. Its totient is φ = 288878368.

The previous prime is 866635109. The next prime is 866635139. The reversal of 866635116 is 611536668.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36109785 + ... + 36109808.

It is an arithmetic number, because the mean of its divisors is an integer number (168512386).

Almost surely, 2^866635116 is an apocalyptic number.

It is an amenable number.

866635116 is an abundant number, since it is smaller than the sum of its proper divisors (1155513516).

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

866635116 is a wasteful number, since it uses less digits than its factorization.

866635116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72219600 (or 72219598 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 866635116 is about 29438.6670214533. The cubic root of 866635116 is about 953.4079322306.

The spelling of 866635116 in words is "eight hundred sixty-six million, six hundred thirty-five thousand, one hundred sixteen".