866708240 has 20 divisors (see below), whose sum is σ = 2015096844. Its totient is φ = 346683264.

The previous prime is 866708231. The next prime is 866708243. The reversal of 866708240 is 42807668.

It can be written as a sum of positive squares in 2 ways, for example, as 220938496 + 645769744 = 14864^2 + 25412^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (866708243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5416847 + ... + 5417006.

Almost surely, 2^866708240 is an apocalyptic number.

866708240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

866708240 is an abundant number, since it is smaller than the sum of its proper divisors (1148388604).

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

866708240 is a wasteful number, since it uses less digits than its factorization.

866708240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10833866 (or 10833860 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 866708240 is about 29439.9089672506. The cubic root of 866708240 is about 953.4347466840.

The spelling of 866708240 in words is "eight hundred sixty-six million, seven hundred eight thousand, two hundred forty".