669189635 has 16 divisors (see below), whose sum is σ = 817383936. Its totient is φ = 525827808.

The previous prime is 669189629. The next prime is 669189641. The reversal of 669189635 is 536981966.

It is an interprime number because it is at equal distance from previous prime (669189629) and next prime (669189641).

It is a cyclic number.

It is not a de Polignac number, because 669189635 - 2¹⁴ = 669173251 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120224 + ... + 125666.

It is an arithmetic number, because the mean of its divisors is an integer number (51086496).

Almost surely, 2^669189635 is an apocalyptic number.

669189635 is a deficient number, since it is larger than the sum of its proper divisors (148194301).

669189635 is a wasteful number, since it uses less digits than its factorization.

669189635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882.

The product of its digits is 2099520, while the sum is 53.

The square root of 669189635 is about 25868.6999093499. The cubic root of 669189635 is about 874.6810854108.

The spelling of 669189635 in words is "six hundred sixty-nine million, one hundred eighty-nine thousand, six hundred thirty-five".