669914719 has 4 divisors (see below), whose sum is σ = 676547640. Its totient is φ = 663281800.

The previous prime is 669914717. The next prime is 669914723. The reversal of 669914719 is 917419966.

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 669914719 - 2¹ = 669914717 is a prime.

It is a super-3 number, since 3×669914719³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669914717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3316309 + ... + 3316510.

It is an arithmetic number, because the mean of its divisors is an integer number (169136910).

Almost surely, 2^669914719 is an apocalyptic number.

669914719 is a deficient number, since it is larger than the sum of its proper divisors (6632921).

669914719 is a wasteful number, since it uses less digits than its factorization.

669914719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6632920.

The product of its digits is 734832, while the sum is 52.

The square root of 669914719 is about 25882.7108124323. The cubic root of 669914719 is about 874.9968844515.

The spelling of 669914719 in words is "six hundred sixty-nine million, nine hundred fourteen thousand, seven hundred nineteen".