667674309 has 8 divisors (see below), whose sum is σ = 892290112. Its totient is φ = 444087360.

The previous prime is 667674289. The next prime is 667674313. The reversal of 667674309 is 903476766.

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

It is not a de Polignac number, because 667674309 - 2⁵ = 667674277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667674209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255697 + ... + 258294.

It is an arithmetic number, because the mean of its divisors is an integer number (111536264).

Almost surely, 2^667674309 is an apocalyptic number.

It is an amenable number.

667674309 is a deficient number, since it is larger than the sum of its proper divisors (224615803).

667674309 is a wasteful number, since it uses less digits than its factorization.

667674309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514427.

The product of its (nonzero) digits is 1143072, while the sum is 48.

The square root of 667674309 is about 25839.3945169000. The cubic root of 667674309 is about 874.0203715053.

The spelling of 667674309 in words is "six hundred sixty-seven million, six hundred seventy-four thousand, three hundred nine".