665000022 has 8 divisors (see below), whose sum is σ = 1330000056. Its totient is φ = 221666672.

The previous prime is 664999949. The next prime is 665000027. The reversal of 665000022 is 220000566.

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

665000022 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665000027) 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, 55416663 + ... + 55416674.

It is an arithmetic number, because the mean of its divisors is an integer number (166250007).

Almost surely, 2^665000022 is an apocalyptic number.

665000022 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.

665000022 is a wasteful number, since it uses less digits than its factorization.

665000022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110833342.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 665000022 is about 25787.5943430170. The cubic root of 665000022 is about 872.8518831440.

Adding to 665000022 its reverse (220000566), we get a palindrome (885000588).

The spelling of 665000022 in words is "six hundred sixty-five million, twenty-two", and thus it is an aban number.