866989416 has 32 divisors (see below), whose sum is σ = 2261712960. Its totient is φ = 276431232.

The previous prime is 866989397. The next prime is 866989427. The reversal of 866989416 is 614989668.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 784765 + ... + 785868.

It is an arithmetic number, because the mean of its divisors is an integer number (70678530).

Almost surely, 2^866989416 is an apocalyptic number.

It is an amenable number.

866989416 is an abundant number, since it is smaller than the sum of its proper divisors (1394723544).

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

866989416 is a wasteful number, since it uses less digits than its factorization.

866989416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570665 (or 1570661 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 57.

The square root of 866989416 is about 29444.6840023798. The cubic root of 866989416 is about 953.5378394246.

The spelling of 866989416 in words is "eight hundred sixty-six million, nine hundred eighty-nine thousand, four hundred sixteen".