669173065 has 24 divisors (see below), whose sum is σ = 924568128. Its totient is φ = 461043360.

The previous prime is 669173047. The next prime is 669173077. The reversal of 669173065 is 560371966.

669173065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 669173065 - 2¹⁷ = 669041993 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3004 + ... + 36706.

It is an arithmetic number, because the mean of its divisors is an integer number (38523672).

Almost surely, 2^669173065 is an apocalyptic number.

It is an amenable number.

669173065 is a deficient number, since it is larger than the sum of its proper divisors (255395063).

669173065 is a wasteful number, since it uses less digits than its factorization.

669173065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33757 (or 33738 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 669173065 is about 25868.3796361504. The cubic root of 669173065 is about 874.6738659399.

The spelling of 669173065 in words is "six hundred sixty-nine million, one hundred seventy-three thousand, sixty-five".