667667913 has 16 divisors (see below), whose sum is σ = 976527552. Its totient is φ = 402408000.

The previous prime is 667667881. The next prime is 667667921. The reversal of 667667913 is 319766766.

It is not a de Polignac number, because 667667913 - 2⁵ = 667667881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667667963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49918 + ... + 61863.

It is an arithmetic number, because the mean of its divisors is an integer number (61032972).

Almost surely, 2^667667913 is an apocalyptic number.

It is an amenable number.

667667913 is a deficient number, since it is larger than the sum of its proper divisors (308859639).

667667913 is a wasteful number, since it uses less digits than its factorization.

667667913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111976.

The product of its digits is 1714608, while the sum is 51.

The square root of 667667913 is about 25839.2707520936. The cubic root of 667667913 is about 874.0175805975.

The spelling of 667667913 in words is "six hundred sixty-seven million, six hundred sixty-seven thousand, nine hundred thirteen".