667088689 has 8 divisors (see below), whose sum is σ = 705767040. Its totient is φ = 628767216.

The previous prime is 667088663. The next prime is 667088693. The reversal of 667088689 is 986880766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667088689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667088699) 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 7 ways as a sum of consecutive naturals, for example, 85369 + ... + 92854.

It is an arithmetic number, because the mean of its divisors is an integer number (88220880).

Almost surely, 2^667088689 is an apocalyptic number.

It is an amenable number.

667088689 is a deficient number, since it is larger than the sum of its proper divisors (38678351).

667088689 is a wasteful number, since it uses less digits than its factorization.

667088689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178439.

The product of its (nonzero) digits is 6967296, while the sum is 58.

The square root of 667088689 is about 25828.0601091139. The cubic root of 667088689 is about 873.7647610862.

It can be divided in two parts, 6670 and 88689, that added together give a palindrome (95359).

The spelling of 667088689 in words is "six hundred sixty-seven million, eighty-eight thousand, six hundred eighty-nine".