666783338 has 8 divisors (see below), whose sum is σ = 1077111588. Its totient is φ = 307746144.

The previous prime is 666783331. The next prime is 666783373. The reversal of 666783338 is 833387666.

It can be written as a sum of positive squares in 2 ways, for example, as 601868089 + 64915249 = 24533^2 + 8057^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (666783331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12822731 + ... + 12822782.

Almost surely, 2^666783338 is an apocalyptic number.

666783338 is a deficient number, since it is larger than the sum of its proper divisors (410328250).

666783338 is a wasteful number, since it uses less digits than its factorization.

666783338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25645528.

The product of its digits is 2612736, while the sum is 50.

The square root of 666783338 is about 25822.1482065300. The cubic root of 666783338 is about 873.6314226625.

The spelling of 666783338 in words is "six hundred sixty-six million, seven hundred eighty-three thousand, three hundred thirty-eight".