669900067 has 4 divisors (see below), whose sum is σ = 670022496. Its totient is φ = 669777640.

The previous prime is 669900041. The next prime is 669900073. The reversal of 669900067 is 760009966.

It is a happy number.

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 669900067 - 2¹⁹ = 669375779 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 669899996 and 669900032.

It is not an unprimeable number, because it can be changed into a prime (669900017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52603 + ... + 64084.

It is an arithmetic number, because the mean of its divisors is an integer number (167505624).

Almost surely, 2^669900067 is an apocalyptic number.

669900067 is a deficient number, since it is larger than the sum of its proper divisors (122429).

669900067 is a wasteful number, since it uses less digits than its factorization.

669900067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122428.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 669900067 is about 25882.4277647983. The cubic root of 669900067 is about 874.9905052575.

The spelling of 669900067 in words is "six hundred sixty-nine million, nine hundred thousand, sixty-seven".