667051389 has 32 divisors (see below), whose sum is σ = 1070720640. Its totient is φ = 408796416.

The previous prime is 667051361. The next prime is 667051393. The reversal of 667051389 is 983150766.

It is a happy number.

667051389 is a `hidden beast` number, since 66 + 70 + 513 + 8 + 9 = 666.

It is not a de Polignac number, because 667051389 - 2¹³ = 667043197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667051309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2839 + ... + 36635.

It is an arithmetic number, because the mean of its divisors is an integer number (33460020).

Almost surely, 2^667051389 is an apocalyptic number.

It is an amenable number.

667051389 is a deficient number, since it is larger than the sum of its proper divisors (403669251).

667051389 is a wasteful number, since it uses less digits than its factorization.

667051389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33866 (or 33860 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 667051389 is about 25827.3380161410. The cubic root of 667051389 is about 873.7484753791.

The spelling of 667051389 in words is "six hundred sixty-seven million, fifty-one thousand, three hundred eighty-nine".