666774107 has 2 divisors, whose sum is σ = 666774108. Its totient is φ = 666774106.

The previous prime is 666774089. The next prime is 666774113. The reversal of 666774107 is 701477666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666774107 - 2¹² = 666770011 is a prime.

It is not a weakly prime, because it can be changed into another prime (666774707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333387053 + 333387054.

It is an arithmetic number, because the mean of its divisors is an integer number (333387054).

Almost surely, 2^666774107 is an apocalyptic number.

666774107 is a deficient number, since it is larger than the sum of its proper divisors (1).

666774107 is an equidigital number, since it uses as much as digits as its factorization.

666774107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 296352, while the sum is 44.

The square root of 666774107 is about 25821.9694640049. The cubic root of 666774107 is about 873.6273911037.

The spelling of 666774107 in words is "six hundred sixty-six million, seven hundred seventy-four thousand, one hundred seven".