665434357393 has 8 divisors (see below), whose sum is σ = 717362706368. Its totient is φ = 613611878544.

The previous prime is 665434357391. The next prime is 665434357411. The reversal of 665434357393 is 393753434566.

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 665434357393 - 2¹ = 665434357391 is a prime.

It is a super-3 number, since 3×665434357393³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665434357391) 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, 26454471 + ... + 26479612.

It is an arithmetic number, because the mean of its divisors is an integer number (89670338296).

Almost surely, 2^665434357393 is an apocalyptic number.

It is an amenable number.

665434357393 is a deficient number, since it is larger than the sum of its proper divisors (51928348975).

665434357393 is a wasteful number, since it uses less digits than its factorization.

665434357393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52935063.

The product of its digits is 73483200, while the sum is 58.

The spelling of 665434357393 in words is "six hundred sixty-five billion, four hundred thirty-four million, three hundred fifty-seven thousand, three hundred ninety-three".