667476321 has 8 divisors (see below), whose sum is σ = 942319584. Its totient is φ = 418808640.

The previous prime is 667476319. The next prime is 667476331. The reversal of 667476321 is 123674766.

It is a happy number.

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

It is not a de Polignac number, because 667476321 - 2¹ = 667476319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667476331) 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, 6543835 + ... + 6543936.

It is an arithmetic number, because the mean of its divisors is an integer number (117789948).

Almost surely, 2^667476321 is an apocalyptic number.

It is an amenable number.

667476321 is a deficient number, since it is larger than the sum of its proper divisors (274843263).

667476321 is a wasteful number, since it uses less digits than its factorization.

667476321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13087791.

The product of its digits is 254016, while the sum is 42.

The square root of 667476321 is about 25835.5631059205. The cubic root of 667476321 is about 873.9339707704.

The spelling of 667476321 in words is "six hundred sixty-seven million, four hundred seventy-six thousand, three hundred twenty-one".