66865036 has 12 divisors (see below), whose sum is σ = 133730128. Its totient is φ = 28656432.

The previous prime is 66865033. The next prime is 66865087. The reversal of 66865036 is 63056866.

66865036 is an admirable number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66865036.

It is not an unprimeable number, because it can be changed into a prime (66865033) 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, 1193991 + ... + 1194046.

Almost surely, 2^66865036 is an apocalyptic number.

It is an amenable number.

66865036 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.

66865036 is a wasteful number, since it uses less digits than its factorization.

66865036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388048 (or 2388046 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 66865036 is about 8177.1043774676. The cubic root of 66865036 is about 405.8819089196.

The spelling of 66865036 in words is "sixty-six million, eight hundred sixty-five thousand, thirty-six".