1016243666 has 4 divisors (see below), whose sum is σ = 1524365502. Its totient is φ = 508121832.

The previous prime is 1016243653. The next prime is 1016243687. The reversal of 1016243666 is 6663426101.

1016243666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6663426101 = 857 ⋅7775293.

It can be written as a sum of positive squares in only one way, i.e., 1015760641 + 483025 = 31871^2 + 695^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254060915 + ... + 254060918.

Almost surely, 2^1016243666 is an apocalyptic number.

1016243666 is a deficient number, since it is larger than the sum of its proper divisors (508121836).

1016243666 is an equidigital number, since it uses as much as digits as its factorization.

1016243666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508121835.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 1016243666 is about 31878.5769130305. The cubic root of 1016243666 is about 1005.3854996604.

Adding to 1016243666 its reverse (6663426101), we get a palindrome (7679669767).

The spelling of 1016243666 in words is "one billion, sixteen million, two hundred forty-three thousand, six hundred sixty-six".