665428042601 has 8 divisors (see below), whose sum is σ = 761098080000. Its totient is φ = 569910227328.

The previous prime is 665428042597. The next prime is 665428042603. The reversal of 665428042601 is 106240824566.

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 665428042601 - 2² = 665428042597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665428042603) 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, 38046161 + ... + 38063646.

It is an arithmetic number, because the mean of its divisors is an integer number (95137260000).

Almost surely, 2^665428042601 is an apocalyptic number.

It is an amenable number.

665428042601 is a deficient number, since it is larger than the sum of its proper divisors (95670037399).

665428042601 is a wasteful number, since it uses less digits than its factorization.

665428042601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76111063.

The product of its (nonzero) digits is 552960, while the sum is 44.

The spelling of 665428042601 in words is "six hundred sixty-five billion, four hundred twenty-eight million, forty-two thousand, six hundred one".