669290019 has 4 divisors (see below), whose sum is σ = 892386696. Its totient is φ = 446193344.

The previous prime is 669289963. The next prime is 669290021. The reversal of 669290019 is 910092966.

It is a happy number.

669290019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 669290019 - 2⁷ = 669289891 is a prime.

It is a super-2 number, since 2×669290019² = 895898259066040722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (669291019) 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, 111548334 + ... + 111548339.

It is an arithmetic number, because the mean of its divisors is an integer number (223096674).

Almost surely, 2^669290019 is an apocalyptic number.

669290019 is a deficient number, since it is larger than the sum of its proper divisors (223096677).

669290019 is a wasteful number, since it uses less digits than its factorization.

669290019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223096676.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 669290019 is about 25870.6400964491. The cubic root of 669290019 is about 874.7248196984.

The spelling of 669290019 in words is "six hundred sixty-nine million, two hundred ninety thousand, nineteen".