669911607 has 16 divisors (see below), whose sum is σ = 995335680. Its totient is φ = 445314456.

The previous prime is 669911597. The next prime is 669911611. The reversal of 669911607 is 706119966.

It is not a de Polignac number, because 669911607 - 2¹⁶ = 669846071 is a prime.

It is a super-2 number, since 2×669911607² = 897563122386644898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669911647) 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, 26383 + ... + 45120.

It is an arithmetic number, because the mean of its divisors is an integer number (62208480).

Almost surely, 2^669911607 is an apocalyptic number.

669911607 is a deficient number, since it is larger than the sum of its proper divisors (325424073).

669911607 is a wasteful number, since it uses less digits than its factorization.

669911607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71859 (or 71853 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 669911607 is about 25882.6506950119. The cubic root of 669911607 is about 874.9955295554.

The spelling of 669911607 in words is "six hundred sixty-nine million, nine hundred eleven thousand, six hundred seven".