666734363 has 2 divisors, whose sum is σ = 666734364. Its totient is φ = 666734362.

The previous prime is 666734287. The next prime is 666734381. The reversal of 666734363 is 363437666.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666734363 is a prime.

It is a super-4 number, since 4×666734363⁴ (a number of 36 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (666734863) 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 as a sum of consecutive naturals, namely, 333367181 + 333367182.

It is an arithmetic number, because the mean of its divisors is an integer number (333367182).

Almost surely, 2^666734363 is an apocalyptic number.

666734363 is a deficient number, since it is larger than the sum of its proper divisors (1).

666734363 is an equidigital number, since it uses as much as digits as its factorization.

666734363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 44.

The square root of 666734363 is about 25821.1998752963. The cubic root of 666734363 is about 873.6100328327.

The spelling of 666734363 in words is "six hundred sixty-six million, seven hundred thirty-four thousand, three hundred sixty-three".