669494319 has 32 divisors (see below), whose sum is σ = 998531520. Its totient is φ = 396168192.

The previous prime is 669494311. The next prime is 669494333. The reversal of 669494319 is 913494966.

It is not a de Polignac number, because 669494319 - 2³ = 669494311 is a prime.

It is a super-2 number, since 2×669494319² = 896445286346547522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669494311) 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 31 ways as a sum of consecutive naturals, for example, 312219 + ... + 314355.

It is an arithmetic number, because the mean of its divisors is an integer number (31204110).

Almost surely, 2^669494319 is an apocalyptic number.

669494319 is a deficient number, since it is larger than the sum of its proper divisors (329037201).

669494319 is a wasteful number, since it uses less digits than its factorization.

669494319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459.

The product of its digits is 1259712, while the sum is 51.

The square root of 669494319 is about 25874.5882865796. The cubic root of 669494319 is about 874.8138135553.

The spelling of 669494319 in words is "six hundred sixty-nine million, four hundred ninety-four thousand, three hundred nineteen".