665662583 has 2 divisors, whose sum is σ = 665662584. Its totient is φ = 665662582.

The previous prime is 665662577. The next prime is 665662631. The reversal of 665662583 is 385266566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665662583 - 2⁴ = 665662567 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665662553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332831291 + 332831292.

It is an arithmetic number, because the mean of its divisors is an integer number (332831292).

Almost surely, 2^665662583 is an apocalyptic number.

665662583 is a deficient number, since it is larger than the sum of its proper divisors (1).

665662583 is an equidigital number, since it uses as much as digits as its factorization.

665662583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 47.

The square root of 665662583 is about 25800.4376513268. The cubic root of 665662583 is about 873.1416704313.

The spelling of 665662583 in words is "six hundred sixty-five million, six hundred sixty-two thousand, five hundred eighty-three".