669853548 has 144 divisors (see below), whose sum is σ = 2113290816. Its totient is φ = 174182400.

The previous prime is 669853537. The next prime is 669853559. The reversal of 669853548 is 845358966.

It is a happy number.

669853548 is a `hidden beast` number, since 6 + 6 + 98 + 5 + 3 + 548 = 666.

It is an interprime number because it is at equal distance from previous prime (669853537) and next prime (669853559).

It is a junction number, because it is equal to n+sod(n) for n = 669853494 and 669853503.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 237748 + ... + 240548.

Almost surely, 2^669853548 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669853548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1056645408).

669853548 is an abundant number, since it is smaller than the sum of its proper divisors (1443437268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669853548 is a wasteful number, since it uses less digits than its factorization.

669853548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2904 (or 2899 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The square root of 669853548 is about 25881.5290892946. The cubic root of 669853548 is about 874.9702511791.

The spelling of 669853548 in words is "six hundred sixty-nine million, eight hundred fifty-three thousand, five hundred forty-eight".