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668304001 = 4801139201
BaseRepresentation
bin100111110101011…
…000001010000001
31201120112100202001
4213311120022001
52332041212001
6150152024001
722363330111
oct4765301201
91646470661
10668304001
11313270762
12167992001
13a85c2471
1464a87041
153da11001
hex27d58281

668304001 has 4 divisors (see below), whose sum is σ = 668448004. Its totient is φ = 668160000.

The previous prime is 668303959. The next prime is 668304011. The reversal of 668304001 is 100403866.

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 276224400 + 392079601 = 16620^2 + 19801^2 .

It is a cyclic number.

It is not a de Polignac number, because 668304001 - 225 = 634749569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668304011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64800 + ... + 74401.

It is an arithmetic number, because the mean of its divisors is an integer number (167112001).

Almost surely, 2668304001 is an apocalyptic number.

It is an amenable number.

668304001 is a deficient number, since it is larger than the sum of its proper divisors (144003).

668304001 is a wasteful number, since it uses less digits than its factorization.

668304001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144002.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 668304001 is about 25851.5763735986. The cubic root of 668304001 is about 874.2950516902.

Adding to 668304001 its reverse (100403866), we get a palindrome (768707867).

The spelling of 668304001 in words is "six hundred sixty-eight million, three hundred four thousand, one".

Divisors: 1 4801 139201 668304001