669588061 has 8 divisors (see below), whose sum is σ = 722353464. Its totient is φ = 618309120.

The previous prime is 669588053. The next prime is 669588077. The reversal of 669588061 is 160885966.

It can be written as a sum of positive squares in 4 ways, for example, as 50324836 + 619263225 = 7094^2 + 24885^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 669588061 - 2³ = 669588053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 669587996 and 669588014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669588961) 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, 370680 + ... + 372481.

It is an arithmetic number, because the mean of its divisors is an integer number (90294183).

Almost surely, 2^669588061 is an apocalyptic number.

It is an amenable number.

669588061 is a deficient number, since it is larger than the sum of its proper divisors (52765403).

669588061 is a wasteful number, since it uses less digits than its factorization.

669588061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743231.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 669588061 is about 25876.3996916109. The cubic root of 669588061 is about 874.8546418675.

The spelling of 669588061 in words is "six hundred sixty-nine million, five hundred eighty-eight thousand, sixty-one".