667459389 has 32 divisors (see below), whose sum is σ = 991440000. Its totient is φ = 397451264.

The previous prime is 667459349. The next prime is 667459433. The reversal of 667459389 is 983954766.

It is a happy number.

It is not a de Polignac number, because 667459389 - 2¹¹ = 667457341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667459339) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83437 + ... + 91085.

It is an arithmetic number, because the mean of its divisors is an integer number (30982500).

Almost surely, 2^667459389 is an apocalyptic number.

It is an amenable number.

667459389 is a deficient number, since it is larger than the sum of its proper divisors (323980611).

667459389 is a wasteful number, since it uses less digits than its factorization.

667459389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7757.

The product of its digits is 9797760, while the sum is 57.

The square root of 667459389 is about 25835.2354159973. The cubic root of 667459389 is about 873.9265809577.

The spelling of 667459389 in words is "six hundred sixty-seven million, four hundred fifty-nine thousand, three hundred eighty-nine".