668792001409 has 8 divisors (see below), whose sum is σ = 777288525120. Its totient is φ = 563534180016.

The previous prime is 668792001407. The next prime is 668792001419. The reversal of 668792001409 is 904100297866.

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 668792001409 - 2¹ = 668792001407 is a prime.

It is a super-2 number, since 2×668792001409² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668792001403) 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 7 ways as a sum of consecutive naturals, for example, 809675134 + ... + 809675959.

It is an arithmetic number, because the mean of its divisors is an integer number (97161065640).

Almost surely, 2^668792001409 is an apocalyptic number.

It is an amenable number.

668792001409 is a deficient number, since it is larger than the sum of its proper divisors (108496523711).

668792001409 is a wasteful number, since it uses less digits than its factorization.

668792001409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619351159.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 668792001409 in words is "six hundred sixty-eight billion, seven hundred ninety-two million, one thousand, four hundred nine".