669028106 has 8 divisors (see below), whose sum is σ = 1004572260. Its totient is φ = 334170688.

The previous prime is 669028103. The next prime is 669028111. The reversal of 669028106 is 601820966.

It can be written as a sum of positive squares in 2 ways, for example, as 473280025 + 195748081 = 21755^2 + 13991^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 669028106.

It is not an unprimeable number, because it can be changed into a prime (669028103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169241 + ... + 173148.

Almost surely, 2^669028106 is an apocalyptic number.

669028106 is a deficient number, since it is larger than the sum of its proper divisors (335544154).

669028106 is a wasteful number, since it uses less digits than its factorization.

669028106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343368.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 669028106 is about 25865.5776274183. The cubic root of 669028106 is about 874.6107029048.

The spelling of 669028106 in words is "six hundred sixty-nine million, twenty-eight thousand, one hundred six".