866658480 has 80 divisors (see below), whose sum is σ = 2712802560. Its totient is φ = 228858624.

The previous prime is 866658461. The next prime is 866658497. The reversal of 866658480 is 84856668.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7191 + ... + 42249.

It is an arithmetic number, because the mean of its divisors is an integer number (33910032).

Almost surely, 2^866658480 is an apocalyptic number.

866658480 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866658480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1356401280).

866658480 is an abundant number, since it is smaller than the sum of its proper divisors (1846144080).

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

866658480 is a wasteful number, since it uses less digits than its factorization.

866658480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35178 (or 35172 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 51.

The square root of 866658480 is about 29439.0638438113. The cubic root of 866658480 is about 953.4164999359.

It can be divided in two parts, 86 and 6658480, that added together give a palindrome (6658566).

The spelling of 866658480 in words is "eight hundred sixty-six million, six hundred fifty-eight thousand, four hundred eighty".