666502633 has 2 divisors, whose sum is σ = 666502634. Its totient is φ = 666502632.

The previous prime is 666502619. The next prime is 666502649. The reversal of 666502633 is 336205666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 519292944 + 147209689 = 22788^2 + 12133^2 .

It is a cyclic number.

It is not a de Polignac number, because 666502633 - 2¹³ = 666494441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666502592 and 666502601.

It is not a weakly prime, because it can be changed into another prime (666502033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333251316 + 333251317.

It is an arithmetic number, because the mean of its divisors is an integer number (333251317).

Almost surely, 2^666502633 is an apocalyptic number.

It is an amenable number.

666502633 is a deficient number, since it is larger than the sum of its proper divisors (1).

666502633 is an equidigital number, since it uses as much as digits as its factorization.

666502633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 37.

The square root of 666502633 is about 25816.7122810012. The cubic root of 666502633 is about 873.5088105557.

The spelling of 666502633 in words is "six hundred sixty-six million, five hundred two thousand, six hundred thirty-three".