667585747 has 2 divisors, whose sum is σ = 667585748. Its totient is φ = 667585746.

The previous prime is 667585727. The next prime is 667585757. The reversal of 667585747 is 747585766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667585747 - 2¹⁵ = 667552979 is a prime.

It is not a weakly prime, because it can be changed into another prime (667585727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333792873 + 333792874.

It is an arithmetic number, because the mean of its divisors is an integer number (333792874).

Almost surely, 2^667585747 is an apocalyptic number.

667585747 is a deficient number, since it is larger than the sum of its proper divisors (1).

667585747 is an equidigital number, since it uses as much as digits as its factorization.

667585747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9878400, while the sum is 55.

The square root of 667585747 is about 25837.6807589226. The cubic root of 667585747 is about 873.9817257096.

The spelling of 667585747 in words is "six hundred sixty-seven million, five hundred eighty-five thousand, seven hundred forty-seven".