667597061 has 4 divisors (see below), whose sum is σ = 667805292. Its totient is φ = 667388832.

The previous prime is 667597039. The next prime is 667597067. The reversal of 667597061 is 160795766.

It is a happy number.

667597061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 350400961 + 317196100 = 18719^2 + 17810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667597061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667596997 and 667597015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667597067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99230 + ... + 105743.

It is an arithmetic number, because the mean of its divisors is an integer number (166951323).

Almost surely, 2^667597061 is an apocalyptic number.

It is an amenable number.

667597061 is a deficient number, since it is larger than the sum of its proper divisors (208231).

667597061 is a wasteful number, since it uses less digits than its factorization.

667597061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208230.

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 667597061 is about 25837.8997017946. The cubic root of 667597061 is about 873.9866629896.

The spelling of 667597061 in words is "six hundred sixty-seven million, five hundred ninety-seven thousand, sixty-one".