669699308919 has 16 divisors (see below), whose sum is σ = 913804848000. Its totient is φ = 436032410016.

The previous prime is 669699308917. The next prime is 669699308923. The reversal of 669699308919 is 919803996966.

It is not a de Polignac number, because 669699308919 - 2¹ = 669699308917 is a prime.

It is a super-2 number, since 2×669699308919² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669699308917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 823777 + ... + 1420565.

It is an arithmetic number, because the mean of its divisors is an integer number (57112803000).

Almost surely, 2^669699308919 is an apocalyptic number.

669699308919 is a deficient number, since it is larger than the sum of its proper divisors (244105539081).

669699308919 is a wasteful number, since it uses less digits than its factorization.

669699308919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605534.

The product of its (nonzero) digits is 306110016, while the sum is 75.

The spelling of 669699308919 in words is "six hundred sixty-nine billion, six hundred ninety-nine million, three hundred eight thousand, nine hundred nineteen".