667591099 has 8 divisors (see below), whose sum is σ = 764100320. Its totient is φ = 571366656.

The previous prime is 667591097. The next prime is 667591103. The reversal of 667591099 is 990195766.

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

It is not a de Polignac number, because 667591099 - 2¹ = 667591097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667591097) 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, 66144 + ... + 75565.

It is an arithmetic number, because the mean of its divisors is an integer number (95512540).

Almost surely, 2^667591099 is an apocalyptic number.

667591099 is a deficient number, since it is larger than the sum of its proper divisors (96509221).

667591099 is a wasteful number, since it uses less digits than its factorization.

667591099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142389.

The product of its (nonzero) digits is 918540, while the sum is 52.

The square root of 667591099 is about 25837.7843283823. The cubic root of 667591099 is about 873.9840612586.

The spelling of 667591099 in words is "six hundred sixty-seven million, five hundred ninety-one thousand, ninety-nine".