669331145 has 16 divisors (see below), whose sum is σ = 966253440. Its totient is φ = 434813184.

The previous prime is 669331133. The next prime is 669331189. The reversal of 669331145 is 541133966.

It is a cyclic number.

It is not a de Polignac number, because 669331145 - 2⁶ = 669331081 is a prime.

It is a super-2 number, since 2×669331145² = 896008363334022050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 669331099 and 669331108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502592 + ... + 503921.

It is an arithmetic number, because the mean of its divisors is an integer number (60390840).

Almost surely, 2^669331145 is an apocalyptic number.

It is an amenable number.

669331145 is a deficient number, since it is larger than the sum of its proper divisors (296922295).

669331145 is a wasteful number, since it uses less digits than its factorization.

669331145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006544.

The product of its digits is 58320, while the sum is 38.

The square root of 669331145 is about 25871.4349234827. The cubic root of 669331145 is about 874.7427357961.

The spelling of 669331145 in words is "six hundred sixty-nine million, three hundred thirty-one thousand, one hundred forty-five".