669669241 has 4 divisors (see below), whose sum is σ = 670345984. Its totient is φ = 668992500.

The previous prime is 669669239. The next prime is 669669263. The reversal of 669669241 is 142966966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 669669241 - 2¹ = 669669239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669669211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336885 + ... + 338866.

It is an arithmetic number, because the mean of its divisors is an integer number (167586496).

Almost surely, 2^669669241 is an apocalyptic number.

It is an amenable number.

669669241 is a deficient number, since it is larger than the sum of its proper divisors (676743).

669669241 is an equidigital number, since it uses as much as digits as its factorization.

669669241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676742.

The product of its digits is 839808, while the sum is 49.

The square root of 669669241 is about 25877.9682548689. The cubic root of 669669241 is about 874.8899958580.

The spelling of 669669241 in words is "six hundred sixty-nine million, six hundred sixty-nine thousand, two hundred forty-one".