400066673 has 2 divisors, whose sum is σ = 400066674. Its totient is φ = 400066672.

The previous prime is 400066663. The next prime is 400066691. The reversal of 400066673 is 376660004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211498849 + 188567824 = 14543^2 + 13732^2 .

It is a cyclic number.

It is not a de Polignac number, because 400066673 - 2⁴ = 400066657 is a prime.

It is not a weakly prime, because it can be changed into another prime (400066613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200033336 + 200033337.

It is an arithmetic number, because the mean of its divisors is an integer number (200033337).

Almost surely, 2^400066673 is an apocalyptic number.

It is an amenable number.

400066673 is a deficient number, since it is larger than the sum of its proper divisors (1).

400066673 is an equidigital number, since it uses as much as digits as its factorization.

400066673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 400066673 is about 20001.6667555481. Note that the first 3 decimals coincide. The cubic root of 400066673 is about 736.8472350258.

The spelling of 400066673 in words is "four hundred million, sixty-six thousand, six hundred seventy-three".