666284027 has 4 divisors (see below), whose sum is σ = 670696656. Its totient is φ = 661871400.

The previous prime is 666283999. The next prime is 666284053. The reversal of 666284027 is 720482666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 720482666 = 2 ⋅360241333.

It is a cyclic number.

It is not a de Polignac number, because 666284027 - 2¹⁰ = 666283003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666284327) 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, 2206088 + ... + 2206389.

It is an arithmetic number, because the mean of its divisors is an integer number (167674164).

Almost surely, 2^666284027 is an apocalyptic number.

666284027 is a deficient number, since it is larger than the sum of its proper divisors (4412629).

666284027 is a wasteful number, since it uses less digits than its factorization.

666284027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4412628.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 666284027 is about 25812.4781258987. The cubic root of 666284027 is about 873.4132994813.

The spelling of 666284027 in words is "six hundred sixty-six million, two hundred eighty-four thousand, twenty-seven".