667051329 has 16 divisors (see below), whose sum is σ = 1028708352. Its totient is φ = 376578768.

The previous prime is 667051309. The next prime is 667051331. The reversal of 667051329 is 923150766.

It is not a de Polignac number, because 667051329 - 2⁷ = 667051201 is a prime.

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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189609 + ... + 193094.

It is an arithmetic number, because the mean of its divisors is an integer number (64294272).

Almost surely, 2^667051329 is an apocalyptic number.

It is an amenable number.

667051329 is a deficient number, since it is larger than the sum of its proper divisors (361657023).

667051329 is a wasteful number, since it uses less digits than its factorization.

667051329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382796.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 667051329 is about 25827.3368545810. The cubic root of 667051329 is about 873.7484491818.

The spelling of 667051329 in words is "six hundred sixty-seven million, fifty-one thousand, three hundred twenty-nine".