669059663 has 4 divisors (see below), whose sum is σ = 669204048. Its totient is φ = 668915280.

The previous prime is 669059659. The next prime is 669059693. The reversal of 669059663 is 366950966.

669059663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 669059663 - 2² = 669059659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669059623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65003 + ... + 74588.

It is an arithmetic number, because the mean of its divisors is an integer number (167301012).

Almost surely, 2^669059663 is an apocalyptic number.

669059663 is a deficient number, since it is larger than the sum of its proper divisors (144385).

669059663 is a wasteful number, since it uses less digits than its factorization.

669059663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144384.

The product of its (nonzero) digits is 1574640, while the sum is 50.

The square root of 669059663 is about 25866.1876394648. The cubic root of 669059663 is about 874.6244540241.

The spelling of 669059663 in words is "six hundred sixty-nine million, fifty-nine thousand, six hundred sixty-three".