665695008 has 72 divisors (see below), whose sum is σ = 2065177296. Its totient is φ = 201724800.

The previous prime is 665695007. The next prime is 665695031. The reversal of 665695008 is 800596566.

665695008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×665695008² = 886299687352240128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (665695007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101898 + ... + 108233.

It is an arithmetic number, because the mean of its divisors is an integer number (28683018).

Almost surely, 2^665695008 is an apocalyptic number.

It is an amenable number.

665695008 is an abundant number, since it is smaller than the sum of its proper divisors (1399482288).

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

665695008 is a wasteful number, since it uses less digits than its factorization.

665695008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210158 (or 210147 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 665695008 is about 25801.0660244882. The cubic root of 665695008 is about 873.1558473631.

The spelling of 665695008 in words is "six hundred sixty-five million, six hundred ninety-five thousand, eight".