667065344 has 44 divisors (see below), whose sum is σ = 1454729208. Its totient is φ = 303206400.

The previous prime is 667065331. The next prime is 667065349. The reversal of 667065344 is 443560766.

It is a tau number, because it is divible by the number of its divisors (44).

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667065349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18347 + ... + 40874.

Almost surely, 2^667065344 is an apocalyptic number.

667065344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

667065344 is an abundant number, since it is smaller than the sum of its proper divisors (787663864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667065344 is a wasteful number, since it uses less digits than its factorization.

667065344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59252 (or 59234 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 41.

The square root of 667065344 is about 25827.6081741999. The cubic root of 667065344 is about 873.7545684004.

The spelling of 667065344 in words is "six hundred sixty-seven million, sixty-five thousand, three hundred forty-four".