667423005 has 32 divisors (see below), whose sum is σ = 1081866240. Its totient is φ = 351320640.

The previous prime is 667422997. The next prime is 667423007. The reversal of 667423005 is 500324766.

It is not a de Polignac number, because 667423005 - 2³ = 667422997 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667423007) 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 31 ways as a sum of consecutive naturals, for example, 646840 + ... + 647870.

It is an arithmetic number, because the mean of its divisors is an integer number (33808320).

Almost surely, 2^667423005 is an apocalyptic number.

It is an amenable number.

667423005 is a deficient number, since it is larger than the sum of its proper divisors (414443235).

667423005 is a wasteful number, since it uses less digits than its factorization.

667423005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 667423005 is about 25834.5312517955. The cubic root of 667423005 is about 873.9107010789.

The spelling of 667423005 in words is "six hundred sixty-seven million, four hundred twenty-three thousand, five".