669338938207 has 4 divisors (see below), whose sum is σ = 669733364736. Its totient is φ = 668944511680.

The previous prime is 669338938199. The next prime is 669338938259. The reversal of 669338938207 is 702839833966.

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 669338938207 - 2³ = 669338938199 is a prime.

It is a super-2 number, since 2×669338938207² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669338938267) 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, 197210719 + ... + 197214112.

It is an arithmetic number, because the mean of its divisors is an integer number (167433341184).

Almost surely, 2^669338938207 is an apocalyptic number.

669338938207 is a deficient number, since it is larger than the sum of its proper divisors (394426529).

669338938207 is a wasteful number, since it uses less digits than its factorization.

669338938207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394426528.

The product of its (nonzero) digits is 70543872, while the sum is 64.

The spelling of 669338938207 in words is "six hundred sixty-nine billion, three hundred thirty-eight million, nine hundred thirty-eight thousand, two hundred seven".