664235343053 has 4 divisors (see below), whose sum is σ = 682187649660. Its totient is φ = 646283036448.

The previous prime is 664235343047. The next prime is 664235343061. The reversal of 664235343053 is 350343532466.

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

It can be written as a sum of positive squares in 2 ways, for example, as 495611776009 + 168623567044 = 703997^2 + 410638^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664235343053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664235342995 and 664235343013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664235342053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8976153248 + ... + 8976153321.

It is an arithmetic number, because the mean of its divisors is an integer number (170546912415).

Almost surely, 2^664235343053 is an apocalyptic number.

It is an amenable number.

664235343053 is a deficient number, since it is larger than the sum of its proper divisors (17952306607).

664235343053 is a wasteful number, since it uses less digits than its factorization.

664235343053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17952306606.

The product of its (nonzero) digits is 2332800, while the sum is 44.

The spelling of 664235343053 in words is "six hundred sixty-four billion, two hundred thirty-five million, three hundred forty-three thousand, fifty-three".