669668867 has 16 divisors (see below), whose sum is σ = 785164800. Its totient is φ = 559172160.

The previous prime is 669668863. The next prime is 669668873. The reversal of 669668867 is 768866966.

669668867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 669668867 - 2² = 669668863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (669668861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262484 + ... + 265022.

It is an arithmetic number, because the mean of its divisors is an integer number (49072800).

Almost surely, 2^669668867 is an apocalyptic number.

669668867 is a deficient number, since it is larger than the sum of its proper divisors (115495933).

669668867 is a wasteful number, since it uses less digits than its factorization.

669668867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506.

The product of its digits is 31352832, while the sum is 62.

The square root of 669668867 is about 25877.9610286437. The cubic root of 669668867 is about 874.8898329871.

The spelling of 669668867 in words is "six hundred sixty-nine million, six hundred sixty-eight thousand, eight hundred sixty-seven".