665501065635 has 64 divisors (see below), whose sum is σ = 1241090565120. Its totient is φ = 298219553280.

The previous prime is 665501065633. The next prime is 665501065639. The reversal of 665501065635 is 536560105566.

It is not a de Polignac number, because 665501065635 - 2¹ = 665501065633 is a prime.

It is a super-2 number, since 2×665501065635² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (665501065633) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1699356 + ... + 2053974.

It is an arithmetic number, because the mean of its divisors is an integer number (19392040080).

Almost surely, 2^665501065635 is an apocalyptic number.

665501065635 is a deficient number, since it is larger than the sum of its proper divisors (575589499485).

665501065635 is a wasteful number, since it uses less digits than its factorization.

665501065635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354988.

The product of its (nonzero) digits is 2430000, while the sum is 48.

The spelling of 665501065635 in words is "six hundred sixty-five billion, five hundred one million, sixty-five thousand, six hundred thirty-five".