669390577 has 8 divisors (see below), whose sum is σ = 716565600. Its totient is φ = 623409984.

The previous prime is 669390541. The next prime is 669390619. The reversal of 669390577 is 775093966.

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 669390577 - 2¹¹ = 669388529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669390517) 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, 297448 + ... + 299689.

It is an arithmetic number, because the mean of its divisors is an integer number (89570700).

Almost surely, 2^669390577 is an apocalyptic number.

It is an amenable number.

669390577 is a deficient number, since it is larger than the sum of its proper divisors (47175023).

669390577 is a wasteful number, since it uses less digits than its factorization.

669390577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597215.

The product of its (nonzero) digits is 2143260, while the sum is 52.

The square root of 669390577 is about 25872.5835006866. The cubic root of 669390577 is about 874.7686254085.

The spelling of 669390577 in words is "six hundred sixty-nine million, three hundred ninety thousand, five hundred seventy-seven".