669817029 has 16 divisors (see below), whose sum is σ = 1037975040. Its totient is φ = 376264560.

The previous prime is 669817019. The next prime is 669817033. The reversal of 669817029 is 920718966.

It is not a de Polignac number, because 669817029 - 2⁵ = 669816997 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669817019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269067 + ... + 271544.

It is an arithmetic number, because the mean of its divisors is an integer number (64873440).

Almost surely, 2^669817029 is an apocalyptic number.

It is an amenable number.

669817029 is a deficient number, since it is larger than the sum of its proper divisors (368158011).

669817029 is a wasteful number, since it uses less digits than its factorization.

669817029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540680.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 669817029 is about 25880.8235765402. The cubic root of 669817029 is about 874.9543503804.

The spelling of 669817029 in words is "six hundred sixty-nine million, eight hundred seventeen thousand, twenty-nine".