666586147 has 2 divisors, whose sum is σ = 666586148. Its totient is φ = 666586146.

The previous prime is 666586103. The next prime is 666586153. The reversal of 666586147 is 741685666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666586147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 666586147.

It is not a weakly prime, because it can be changed into another prime (666586157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333293073 + 333293074.

It is an arithmetic number, because the mean of its divisors is an integer number (333293074).

Almost surely, 2^666586147 is an apocalyptic number.

666586147 is a deficient number, since it is larger than the sum of its proper divisors (1).

666586147 is an equidigital number, since it uses as much as digits as its factorization.

666586147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 49.

The square root of 666586147 is about 25818.3296709915. The cubic root of 666586147 is about 873.5452931163.

The spelling of 666586147 in words is "six hundred sixty-six million, five hundred eighty-six thousand, one hundred forty-seven".