669832136938 has 8 divisors (see below), whose sum is σ = 1013639782788. Its totient is φ = 331952209344.

The previous prime is 669832136933. The next prime is 669832136957. The reversal of 669832136938 is 839631238966.

It can be written as a sum of positive squares in 2 ways, for example, as 419368922569 + 250463214369 = 647587^2 + 500463^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 669832136938.

It is not an unprimeable number, because it can be changed into a prime (669832136933) 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, 1481929281 + ... + 1481929732.

Almost surely, 2^669832136938 is an apocalyptic number.

669832136938 is a deficient number, since it is larger than the sum of its proper divisors (343807645850).

669832136938 is a wasteful number, since it uses less digits than its factorization.

669832136938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2963859128.

The product of its digits is 60466176, while the sum is 64.

The spelling of 669832136938 in words is "six hundred sixty-nine billion, eight hundred thirty-two million, one hundred thirty-six thousand, nine hundred thirty-eight".