669061223 has 4 divisors (see below), whose sum is σ = 671082888. Its totient is φ = 667039560.

The previous prime is 669061157. The next prime is 669061243. The reversal of 669061223 is 322160966.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669061223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669061243) 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, 1010336 + ... + 1010997.

It is an arithmetic number, because the mean of its divisors is an integer number (167770722).

Almost surely, 2^669061223 is an apocalyptic number.

669061223 is a deficient number, since it is larger than the sum of its proper divisors (2021665).

669061223 is a wasteful number, since it uses less digits than its factorization.

669061223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021664.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 669061223 is about 25866.2177946448. The cubic root of 669061223 is about 874.6251337907.

The spelling of 669061223 in words is "six hundred sixty-nine million, sixty-one thousand, two hundred twenty-three".