667157005 has 8 divisors (see below), whose sum is σ = 801324792. Its totient is φ = 533234688.

The previous prime is 667157003. The next prime is 667157009. The reversal of 667157005 is 500751766.

It can be written as a sum of positive squares in 4 ways, for example, as 174583369 + 492573636 = 13213^2 + 22194^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 667157005 - 2¹ = 667157003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667157003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55332 + ... + 66301.

It is an arithmetic number, because the mean of its divisors is an integer number (100165599).

Almost surely, 2^667157005 is an apocalyptic number.

It is an amenable number.

667157005 is a deficient number, since it is larger than the sum of its proper divisors (134167787).

667157005 is a wasteful number, since it uses less digits than its factorization.

667157005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122735.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 667157005 is about 25829.3825903756. The cubic root of 667157005 is about 873.7945872432.

The spelling of 667157005 in words is "six hundred sixty-seven million, one hundred fifty-seven thousand, five".