667601109 has 20 divisors (see below), whose sum is σ = 1139750304. Its totient is φ = 381486024.

The previous prime is 667601093. The next prime is 667601149. The reversal of 667601109 is 901106766.

It is not a de Polignac number, because 667601109 - 2⁴ = 667601093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667601149) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 588147 + ... + 589280.

Almost surely, 2^667601109 is an apocalyptic number.

It is an amenable number.

667601109 is a deficient number, since it is larger than the sum of its proper divisors (472149195).

667601109 is a wasteful number, since it uses less digits than its factorization.

667601109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177446 (or 1177437 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 667601109 is about 25837.9780362164. The cubic root of 667601109 is about 873.9884294698.

The spelling of 667601109 in words is "six hundred sixty-seven million, six hundred one thousand, one hundred nine".