665001286663 has 4 divisors (see below), whose sum is σ = 760001470480. Its totient is φ = 570001102848.

The previous prime is 665001286633. The next prime is 665001286693. The reversal of 665001286663 is 366682100566.

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

It is an interprime number because it is at equal distance from previous prime (665001286633) and next prime (665001286693).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665001286663 is a prime.

It is a super-2 number, since 2×665001286663² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665001286633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47500091898 + ... + 47500091911.

It is an arithmetic number, because the mean of its divisors is an integer number (190000367620).

Almost surely, 2^665001286663 is an apocalyptic number.

665001286663 is a deficient number, since it is larger than the sum of its proper divisors (95000183817).

665001286663 is an equidigital number, since it uses as much as digits as its factorization.

665001286663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95000183816.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 665001286663 in words is "six hundred sixty-five billion, one million, two hundred eighty-six thousand, six hundred sixty-three".