669459524 has 12 divisors (see below), whose sum is σ = 1240469244. Its totient is φ = 315039744.

The previous prime is 669459523. The next prime is 669459617. The reversal of 669459524 is 425954966.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 456591424 + 212868100 = 21368^2 + 14590^2 .

It is not an unprimeable number, because it can be changed into a prime (669459523) 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, 4922429 + ... + 4922564.

It is an arithmetic number, because the mean of its divisors is an integer number (103372437).

Almost surely, 2^669459524 is an apocalyptic number.

It is an amenable number.

669459524 is a deficient number, since it is larger than the sum of its proper divisors (571009720).

669459524 is a wasteful number, since it uses less digits than its factorization.

669459524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9845014 (or 9845012 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 50.

The square root of 669459524 is about 25873.9158999947. The cubic root of 669459524 is about 874.7986580003.

The spelling of 669459524 in words is "six hundred sixty-nine million, four hundred fifty-nine thousand, five hundred twenty-four".