866197560 has 128 divisors (see below), whose sum is σ = 2679024960. Its totient is φ = 223948800.

The previous prime is 866197537. The next prime is 866197597. The reversal of 866197560 is 65791668.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 533550 + ... + 535170.

Almost surely, 2^866197560 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866197560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339512480).

866197560 is an abundant number, since it is smaller than the sum of its proper divisors (1812827400).

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

866197560 is a wasteful number, since it uses less digits than its factorization.

866197560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1769 (or 1765 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 866197560 is about 29431.2344287493. The cubic root of 866197560 is about 953.2474496232.

The spelling of 866197560 in words is "eight hundred sixty-six million, one hundred ninety-seven thousand, five hundred sixty".