669289536 has 84 divisors (see below), whose sum is σ = 1928368000. Its totient is φ = 221937408.

The previous prime is 669289493. The next prime is 669289547. The reversal of 669289536 is 635982966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111705 + ... + 117543.

Almost surely, 2^669289536 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 669289536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (964184000).

669289536 is an abundant number, since it is smaller than the sum of its proper divisors (1259078464).

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

669289536 is a wasteful number, since it uses less digits than its factorization.

669289536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6056 (or 6043 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The square root of 669289536 is about 25870.6307615412. The cubic root of 669289536 is about 874.7246092803.

The spelling of 669289536 in words is "six hundred sixty-nine million, two hundred eighty-nine thousand, five hundred thirty-six".