669080518786 has 4 divisors (see below), whose sum is σ = 1003620778182. Its totient is φ = 334540259392.

The previous prime is 669080518739. The next prime is 669080518787. The reversal of 669080518786 is 687815080966.

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

It can be written as a sum of positive squares in only one way, i.e., 438483676761 + 230596842025 = 662181^2 + 480205^2 .

It is not an unprimeable number, because it can be changed into a prime (669080518787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167270129695 + ... + 167270129698.

Almost surely, 2^669080518786 is an apocalyptic number.

669080518786 is a deficient number, since it is larger than the sum of its proper divisors (334540259396).

669080518786 is a wasteful number, since it uses less digits than its factorization.

669080518786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334540259395.

The product of its (nonzero) digits is 34836480, while the sum is 64.

The spelling of 669080518786 in words is "six hundred sixty-nine billion, eighty million, five hundred eighteen thousand, seven hundred eighty-six".