665050655651 has 8 divisors (see below), whose sum is σ = 704256857424. Its totient is φ = 625853962240.

The previous prime is 665050655597. The next prime is 665050655683. The reversal of 665050655651 is 156556050566.

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

It is a cyclic number.

It is not a de Polignac number, because 665050655651 - 2¹⁸ = 665050393507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 665050655651.

It is not an unprimeable number, because it can be changed into a prime (665050655551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2232830 + ... + 2513091.

It is an arithmetic number, because the mean of its divisors is an integer number (88032107178).

Almost surely, 2^665050655651 is an apocalyptic number.

665050655651 is a deficient number, since it is larger than the sum of its proper divisors (39206201773).

665050655651 is a wasteful number, since it uses less digits than its factorization.

665050655651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4754181.

The product of its (nonzero) digits is 4050000, while the sum is 50.

The spelling of 665050655651 in words is "six hundred sixty-five billion, fifty million, six hundred fifty-five thousand, six hundred fifty-one".