667246636 has 48 divisors (see below), whose sum is σ = 1408422400. Its totient is φ = 270200448.

The previous prime is 667246631. The next prime is 667246667. The reversal of 667246636 is 636642766.

It is not an unprimeable number, because it can be changed into a prime (667246631) 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, 232120 + ... + 234976.

Almost surely, 2^667246636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667246636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (704211200).

667246636 is an abundant number, since it is smaller than the sum of its proper divisors (741175764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667246636 is a wasteful number, since it uses less digits than its factorization.

667246636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326 (or 3324 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 46.

The square root of 667246636 is about 25831.1175909987. The cubic root of 667246636 is about 873.8337162513.

The spelling of 667246636 in words is "six hundred sixty-seven million, two hundred forty-six thousand, six hundred thirty-six".