916558866 has 24 divisors (see below), whose sum is σ = 1987452480. Its totient is φ = 305277336.

The previous prime is 916558831. The next prime is 916558913. The reversal of 916558866 is 668855619.

It is a happy number.

916558866 is a `hidden beast` number, since 9 + 1 + 6 + 558 + 86 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3915 + ... + 42993.

It is an arithmetic number, because the mean of its divisors is an integer number (82810520).

Almost surely, 2^916558866 is an apocalyptic number.

916558866 is an abundant number, since it is smaller than the sum of its proper divisors (1070893614).

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

916558866 is a wasteful number, since it uses less digits than its factorization.

916558866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40390 (or 40387 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The square root of 916558866 is about 30274.7232192137. The cubic root of 916558866 is about 971.3746994326.

The spelling of 916558866 in words is "nine hundred sixteen million, five hundred fifty-eight thousand, eight hundred sixty-six".