866380536 has 96 divisors (see below), whose sum is σ = 2781018240. Its totient is φ = 247533408.

The previous prime is 866380523. The next prime is 866380549. The reversal of 866380536 is 635083668.

866380536 is a `hidden beast` number, since 8 + 6 + 638 + 0 + 5 + 3 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (866380523) and next prime (866380549).

It is a junction number, because it is equal to n+sod(n) for n = 866380491 and 866380500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18226 + ... + 45441.

It is an arithmetic number, because the mean of its divisors is an integer number (28968940).

Almost surely, 2^866380536 is an apocalyptic number.

It is an amenable number.

866380536 is an abundant number, since it is smaller than the sum of its proper divisors (1914637704).

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

866380536 is a wasteful number, since it uses less digits than its factorization.

866380536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63695 (or 63679 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 866380536 is about 29434.3427988464. The cubic root of 866380536 is about 953.3145663847.

The spelling of 866380536 in words is "eight hundred sixty-six million, three hundred eighty thousand, five hundred thirty-six".