669817033 has 2 divisors, whose sum is σ = 669817034. Its totient is φ = 669817032.

The previous prime is 669817019. The next prime is 669817039. The reversal of 669817033 is 330718966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 595994569 + 73822464 = 24413^2 + 8592^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669817033 is a prime.

It is not a weakly prime, because it can be changed into another prime (669817039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334908516 + 334908517.

It is an arithmetic number, because the mean of its divisors is an integer number (334908517).

Almost surely, 2^669817033 is an apocalyptic number.

It is an amenable number.

669817033 is a deficient number, since it is larger than the sum of its proper divisors (1).

669817033 is an equidigital number, since it uses as much as digits as its factorization.

669817033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 669817033 is about 25880.8236538175. The cubic root of 669817033 is about 874.9543521220.

The spelling of 669817033 in words is "six hundred sixty-nine million, eight hundred seventeen thousand, thirty-three".