865656006 has 8 divisors (see below), whose sum is σ = 1731312024. Its totient is φ = 288552000.

The previous prime is 865655977. The next prime is 865656007. The reversal of 865656006 is 600656568.

It is a sphenic number, since it is the product of 3 distinct primes.

865656006 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865656007) 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, 72137995 + ... + 72138006.

It is an arithmetic number, because the mean of its divisors is an integer number (216414003).

Almost surely, 2^865656006 is an apocalyptic number.

865656006 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

865656006 is a wasteful number, since it uses less digits than its factorization.

865656006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144276006.

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 865656006 is about 29422.0326626153. The cubic root of 865656006 is about 953.0487487666.

The spelling of 865656006 in words is "eight hundred sixty-five million, six hundred fifty-six thousand, six".