669564592 has 40 divisors (see below), whose sum is σ = 1358243424. Its totient is φ = 319148544.

The previous prime is 669564583. The next prime is 669564593. The reversal of 669564592 is 295465966.

It is not an unprimeable number, because it can be changed into a prime (669564593) 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 7 ways as a sum of consecutive naturals, for example, 112278 + ... + 118090.

Almost surely, 2^669564592 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 669564592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (679121712).

669564592 is an abundant number, since it is smaller than the sum of its proper divisors (688678832).

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

669564592 is a wasteful number, since it uses less digits than its factorization.

669564592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6157 (or 6151 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 52.

The square root of 669564592 is about 25875.9462049217. The cubic root of 669564592 is about 874.8444205565.

The spelling of 669564592 in words is "six hundred sixty-nine million, five hundred sixty-four thousand, five hundred ninety-two".