665567172133 has 8 divisors (see below), whose sum is σ = 676399147776. Its totient is φ = 654775690800.

The previous prime is 665567172121. The next prime is 665567172163. The reversal of 665567172133 is 331271765566.

It is a happy number.

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 665567172133 - 2²¹ = 665565074981 is a prime.

It is a super-2 number, since 2×665567172133² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665567172163) 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, 10090438 + ... + 10156183.

It is an arithmetic number, because the mean of its divisors is an integer number (84549893472).

Almost surely, 2^665567172133 is an apocalyptic number.

It is an amenable number.

665567172133 is a deficient number, since it is larger than the sum of its proper divisors (10831975643).

665567172133 is a wasteful number, since it uses less digits than its factorization.

665567172133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20247155.

The product of its digits is 4762800, while the sum is 52.

The spelling of 665567172133 in words is "six hundred sixty-five billion, five hundred sixty-seven million, one hundred seventy-two thousand, one hundred thirty-three".