667830865 has 16 divisors (see below), whose sum is σ = 873448128. Its totient is φ = 487221696.

The previous prime is 667830857. The next prime is 667830869. The reversal of 667830865 is 568038766.

It is a happy number.

667830865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 667830865 - 2³ = 667830857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667830869) 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, 56499 + ... + 67288.

It is an arithmetic number, because the mean of its divisors is an integer number (54590508).

Almost surely, 2^667830865 is an apocalyptic number.

667830865 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

667830865 is a deficient number, since it is larger than the sum of its proper divisors (205617263).

667830865 is a wasteful number, since it uses less digits than its factorization.

667830865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123888.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 667830865 is about 25842.4237446877. The cubic root of 667830865 is about 874.0886794802.

The spelling of 667830865 in words is "six hundred sixty-seven million, eight hundred thirty thousand, eight hundred sixty-five".