669499006506 has 32 divisors (see below), whose sum is σ = 1464098666688. Its totient is φ = 202409936640.

The previous prime is 669499006499. The next prime is 669499006507. The reversal of 669499006506 is 605600994966.

It is a self number, because there is not a number n which added to its sum of digits gives 669499006506.

It is not an unprimeable number, because it can be changed into a prime (669499006507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11684961 + ... + 11742116.

It is an arithmetic number, because the mean of its divisors is an integer number (45753083334).

Almost surely, 2^669499006506 is an apocalyptic number.

669499006506 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

669499006506 is an abundant number, since it is smaller than the sum of its proper divisors (794599660182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669499006506 is a wasteful number, since it uses less digits than its factorization.

669499006506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23427526.

The product of its (nonzero) digits is 18895680, while the sum is 60.

The spelling of 669499006506 in words is "six hundred sixty-nine billion, four hundred ninety-nine million, six thousand, five hundred six".