667115636 has 24 divisors (see below), whose sum is σ = 1274271264. Its totient is φ = 303070880.

The previous prime is 667115599. The next prime is 667115639. The reversal of 667115636 is 636511766.

It is a junction number, because it is equal to n+sod(n) for n = 667115593 and 667115602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667115639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122426 + ... + 127758.

It is an arithmetic number, because the mean of its divisors is an integer number (53094636).

Almost surely, 2^667115636 is an apocalyptic number.

It is an amenable number.

667115636 is a deficient number, since it is larger than the sum of its proper divisors (607155628).

667115636 is a wasteful number, since it uses less digits than its factorization.

667115636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8191 (or 8189 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 667115636 is about 25828.5817651686. The cubic root of 667115636 is about 873.7765261495.

The spelling of 667115636 in words is "six hundred sixty-seven million, one hundred fifteen thousand, six hundred thirty-six".