669326949 has 16 divisors (see below), whose sum is σ = 1014657600. Its totient is φ = 435840048.

The previous prime is 669326939. The next prime is 669326963. The reversal of 669326949 is 949623966.

It is not a de Polignac number, because 669326949 - 2¹⁶ = 669261413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 669326895 and 669326904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669326939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287094 + ... + 289415.

It is an arithmetic number, because the mean of its divisors is an integer number (63416100).

Almost surely, 2^669326949 is an apocalyptic number.

It is an amenable number.

669326949 is a deficient number, since it is larger than the sum of its proper divisors (345330651).

669326949 is a wasteful number, since it uses less digits than its factorization.

669326949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576561 (or 576555 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 54.

The square root of 669326949 is about 25871.3538300569. The cubic root of 669326949 is about 874.7409078877.

The spelling of 669326949 in words is "six hundred sixty-nine million, three hundred twenty-six thousand, nine hundred forty-nine".