663265666606 has 4 divisors (see below), whose sum is σ = 994898499912. Its totient is φ = 331632833302.

The previous prime is 663265666579. The next prime is 663265666639. The reversal of 663265666606 is 606666562366.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165816416650 + ... + 165816416653.

It is an arithmetic number, because the mean of its divisors is an integer number (248724624978).

Almost surely, 2^663265666606 is an apocalyptic number.

663265666606 is a deficient number, since it is larger than the sum of its proper divisors (331632833306).

663265666606 is a wasteful number, since it uses less digits than its factorization.

663265666606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331632833305.

The product of its (nonzero) digits is 50388480, while the sum is 58.

The spelling of 663265666606 in words is "six hundred sixty-three billion, two hundred sixty-five million, six hundred sixty-six thousand, six hundred six".