667272389 has 24 divisors (see below), whose sum is σ = 845374848. Its totient is φ = 514863360.

The previous prime is 667272383. The next prime is 667272391. The reversal of 667272389 is 983272766.

667272389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 667272389 - 2⁴ = 667272373 is a prime.

It is a super-2 number, since 2×667272389² = 890504882243534642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667272383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39359 + ... + 53699.

It is an arithmetic number, because the mean of its divisors is an integer number (35223952).

Almost surely, 2^667272389 is an apocalyptic number.

It is an amenable number.

667272389 is a deficient number, since it is larger than the sum of its proper divisors (178102459).

667272389 is a wasteful number, since it uses less digits than its factorization.

667272389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14405 (or 14388 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 50.

The square root of 667272389 is about 25831.6160741058. The cubic root of 667272389 is about 873.8449582464.

The spelling of 667272389 in words is "six hundred sixty-seven million, two hundred seventy-two thousand, three hundred eighty-nine".