667120065 has 16 divisors (see below), whose sum is σ = 1069632000. Its totient is φ = 355050752.

The previous prime is 667119997. The next prime is 667120073. The reversal of 667120065 is 560021766.

667120065 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 667120065 - 2⁹ = 667119553 is a prime.

It is a super-2 number, since 2×667120065² = 890098362251208450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39240 + ... + 53609.

It is an arithmetic number, because the mean of its divisors is an integer number (66852000).

Almost surely, 2^667120065 is an apocalyptic number.

It is an amenable number.

667120065 is a deficient number, since it is larger than the sum of its proper divisors (402511935).

667120065 is a wasteful number, since it uses less digits than its factorization.

667120065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93336.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 667120065 is about 25828.6675033769. The cubic root of 667120065 is about 873.7784598211.

The spelling of 667120065 in words is "six hundred sixty-seven million, one hundred twenty thousand, sixty-five".