669084528 has 80 divisors (see below), whose sum is σ = 1979198720. Its totient is φ = 190798848.

The previous prime is 669084511. The next prime is 669084529. The reversal of 669084528 is 825480966.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669084529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206376 + ... + 209592.

It is an arithmetic number, because the mean of its divisors is an integer number (24739984).

Almost surely, 2^669084528 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 669084528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (989599360).

669084528 is an abundant number, since it is smaller than the sum of its proper divisors (1310114192).

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

669084528 is a wasteful number, since it uses less digits than its factorization.

669084528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3854 (or 3848 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 669084528 is about 25866.6682817869. The cubic root of 669084528 is about 874.6352887667.

The spelling of 669084528 in words is "six hundred sixty-nine million, eighty-four thousand, five hundred twenty-eight".